What is synesthesia?

 

Synesthesia (pronounced sin-es-THEE-zee-uh) is a neurological condition where stimulation of one sense automatically and consistently triggers another sense. For example:

• 🎵 Hearing music may produce the experience of seeing colours.
• 🔤 Looking at letters or numbers may automatically produce specific colours.
• 👃 Certain smells may create the experience of seeing shapes or colours.
• 🍋 Words may have a particular taste.
• 🤝 Touching certain textures may trigger sounds.

Unlike imagination, these experiences happen automatically and are usually the same every time.

Examples

Here are some common forms of synesthesia:

Stimulus	Synesthetic Experience
Music	Seeing colours or moving shapes
Letters and numbers	Each has its own colour
Words	Taste flavours
Sounds	Feel physical sensations
Days of the week	Each day has a colour
People's names	Each name has a colour or texture

For example:

• Monday might always be blue.
• The letter A might always be red.
• A trumpet might produce bright yellow flashes.
• The word "coffee" might taste like chocolate.

These experiences are different for each person, but they tend to stay consistent over many years.

Is it a disorder?

No.

Researchers generally consider synesthesia to be a neurological variation, not a mental illness or disease. Many people with synesthesia don't realise their experiences are unusual until they discover that other people don't experience the world the same way.

How common is it?

Scientists estimate that around 3–5% of people have some form of synesthesia, although estimates vary depending on how it is measured.

Why does it happen?

Researchers are still investigating the cause, but the main ideas are:

• 🧠 Some areas of the brain have stronger connections than usual.
• 🧬 It often runs in families, suggesting a genetic component.
• 👶 It usually begins in childhood.

Very rarely, synesthesia can appear later in life after certain brain injuries or neurological conditions, but lifelong synesthesia is much more common.

Can it be helpful?

For many people, yes.

Some studies suggest that people with synesthesia may have:

• Better memory.
• Stronger mental imagery.
• Increased creativity.
• Easier learning through associations.

However, not everyone experiences these advantages, and synesthesia itself doesn't make someone more intelligent.

Synesthesia and psychology

Psychologists study synesthesia because it helps answer important questions about:

• How the brain processes information.
• How our senses work together.
• Perception and consciousness.
• Memory and learning.
• Brain organisation.

It shows that the brain is capable of linking different types of sensory information in ways that most people do not experience.

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Easy Read Summary

Synesthesia means "senses working together."

• 👀 You may see colours when you hear music.
• 🎵 You may hear sounds when you see movement.
• 🍋 You may taste words.
• 👃 You may smell colours.

It is:

• ✅ A natural brain difference.
• ✅ Usually present from childhood.
• ✅ Automatic and consistent.
• ✅ Not a mental illness.

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Since you've been studying sensation and perception, synesthesia is a great example of how perception is created by the brain, not just by the senses. Our eyes, ears, nose, skin, and tongue collect information, but the brain interprets it—and in people with synesthesia, that interpretation includes unique links between different senses.

The Vestibular Sense (Easy Read)

 

What is the Vestibular Sense?

The vestibular sense is your sense of balance.

It helps you:

• 🚶 Stay balanced.

• 🧍 Stand upright.

• 🏃 Walk and run safely.

• 🔄 Know if your head is moving.

• 🌍 Know which way is up and down.

Without the vestibular sense, it would be difficult to keep your balance.

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Where is the Vestibular System?

The vestibular system is located in the inner ear, adjacent to the cochlea, which is involved in hearing.

The main parts are:

• Three semicircular canals

• Utricle

• Saccule

  Easy Memory Trick

  Think of the 3 B's:

  • Balance = Vestibular Sense
  • Body Position = Proprioception
  • Body Movement = Kinesthesia

  This is a simple way to remember the difference between the three senses.

These structures are filled with fluid and contain tiny hair cells.

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How Does It Work?

When you:

• Turn your head

• Bend over

• Spin around

• Jump

• Ride in a car

The fluid inside the vestibular system moves.

This movement bends the tiny hair cells.

The hair cells send messages through the vestibular nerve to the brain.

The brain then knows:

• Which way your head is moving.

• How fast you are moving.

• How to keep your balance.

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Vestibular Sense, Proprioception and Kinesthesia

These three senses work together.

Vestibular Sense

• Helps with balance.

• Helps you know your position in space.

Proprioception

• Helps you know where your body parts are.

• Uses receptors in your muscles, joints, tendons, and skin.

Kinesthesia

• Helps you know how your body is moving.

• Important for movement, coordination, and muscle memory.

Together, they help you move safely without having to think about every movement.

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Everyday Examples

✅ Walking without falling over.

✅ Riding a bicycle.

✅ Going up and down stairs.

✅ Catching a ball.

✅ Standing on one foot.

✅ Closing your eyes and touching your nose.

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What Happens if the Vestibular System Is Not Working Properly?

A problem with the vestibular system may cause:

• 😵 Dizziness

• 🌪️ Vertigo (feeling like the room is spinning)

• 🤢 Motion sickness

• 🚶 Difficulty walking or balancing

Sometimes this can happen because of an inner ear infection or another condition affecting the inner ear.

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Summary

Sense	Main Job	Body Part
Vestibular Sense	Balance and spatial orientation	Inner ear
Proprioception	Knows where your body parts are	Muscles, joints, tendons, skin
Kinesthesia	Knows how your body is moving	Muscles and joints

These three senses work together to help you stay balanced, move safely, and understand where your body is in space.

Kinesthetic Sense and Smell (Easy Read)

 

Kinesthetic Sense (Proprioception)

The kinesthetic sense, also called proprioception, helps you know:

• 🚶 Where your body is.

• 🤸 How your body is moving.

• ✋ Where your arms, legs, hands, and feet are, even with your eyes closed.

Special receptors in your:

• Muscles

• Tendons

• Joints

send messages to the brain. This helps you move safely and keep your balance.

Examples

• Walking without looking at your feet.

• Touching your nose with your eyes closed.

• Climbing stairs.

• Picking up a cup without watching your hand.

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Smell (Olfactory Sense)

The olfactory sense is your sense of smell.

Tiny smell receptors inside your nose detect chemicals in the air.

These receptors send messages to the brain, which tells you what you are smelling.

Examples

• 🌹 Flowers

• 🍕 Pizza

• ☕ Coffee

• 🔥 Smoke

• 🧴 Perfume

Smell is closely linked to memory and emotion.

A familiar smell can remind you of:

• Your childhood.

• A family member.

• A holiday.

• A favourite meal.

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How Kinesthetic Sense and Smell Work Together

These two senses use different parts of the body, but they work together to help you understand your surroundings.

As you move around, you notice different smells.

Examples

• Walking into a bakery and smelling fresh bread.

• Entering a garden and smelling flowers.

• Walking into a kitchen and smelling dinner cooking.

• Smelling smoke while moving through a building, which helps you recognise danger.

Your brain combines information from movement and smell to help you understand where you are and what is happening around you.

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Summary

Kinesthetic Sense (Proprioception)

• 🦵 Knows where your body is.

• 🚶 Helps with movement and balance.

• 💪 Uses receptors in muscles, tendons, and joints.

Smell (Olfaction)

• 👃 Detects smells in the air.

• 🧠 Helps with memories and emotions.

• 🌸 Uses smell receptors in the nose.

Both senses work together to help you move safely and understand the world around you.

Easy Way to Remember

Sense	Main Job	Example
Kinesthetic (Proprioception)	Knows where your body is and how it moves	Walking without looking at your feet
Smell (Olfaction)	Detects smells in the air	Smelling fresh bread in a bakery

Memory tip:

• Kinesthetic = Keep track of your body.
• Olfactory = Odours (smells).

The Cerebral Cortex (Easy Read)

 

The cerebral cortex is the outer layer of the brain.

It is often called the brain's "thinking layer."

The cerebral cortex helps us:

• 🧠 Think and reason – solve problems, make decisions, and learn new things.
• 👀 Process our senses – understand what we see, hear, feel, smell, and taste.
• 🗣️ Use language – understand what people say and help us speak, read, and write.
• 🚶 Control movement – plan and control voluntary body movements, such as walking, writing, and picking up objects.

The Four Lobes of the Cerebral Cortex

Frontal Lobe

• Thinking and planning
• Decision-making
• Problem-solving
• Personality
• Emotions
• Speaking
• Voluntary movement

Parietal Lobe

• Touch
• Pressure
• Pain
• Temperature
• Body position (where your body parts are)

Temporal Lobe

• Hearing
• Memory
• Understanding language
• Recognising people and objects

Occipital Lobe

• Vision
• Processing what the eyes see
• Recognising colours, shapes, and movement

Summary

The cerebral cortex is the outer layer of the brain. It helps us think, learn, remember, communicate, understand our senses, and control our movements. Different parts of the cerebral cortex work together every day to help us live, learn, and interact with the world around us.

Quick Memory Tip

F-P-T-O

• F = Frontal → Future thinking and movement
• P = Parietal → Pressure, pain, and position
• T = Temporal → Talking, hearing, and memory
• O = Occipital → Optical (vision)

This mnemonic can make it easier to remember the main functions of each lobe.

The Chemical Senses

 

Taste and smell are closely linked, working together to create what we perceive as food flavor.

 

Taste (Gustation): Soluble molecules dissolve in saliva to activate taste buds (which have a life cycle of 10 to 14 days). There are six recognized taste groupings: sweet, salty, sour, bitter, umami (savory/MSG), and potentially fat content.

 

Smell (Olfaction): Odor molecules bind to olfactory receptor cells in the mucous membrane of the nose, sending signals directly to the olfactory bulb in the frontal lobe. Humans have fewer than 400 functional olfactory receptor genes compared to a dog's 800–1200.

 

2. Touch, Temperature, and Pain

Sensory information from the skin travels up the spinal cord to the somatosensory cortex located in the parietal lobe.

 

Tactile Receptors: Specialized structures in the skin detect different physical stimuli:

 

Meissner’s corpuscles: Pressure and lower frequency vibrations.

 

Pacinian corpuscles: Transient pressure and higher frequency vibrations.

 

Merkel’s disks: Light pressure.

 

Ruffini corpuscles: Stretch.

 

Thermoception & Nociception: Free nerve endings serve as receptors for temperature (thermoception) and potential harm/pain (nociception).

 

Pain Classification:

 

Inflammatory pain: Signals actual tissue damage.

 

Neuropathic pain: Results from damage to neurons in the nervous system, which exaggerates pain signals.

 

3. Body Position and Balance

Vestibular Sense: Controls balance and body posture using fluid-filled organs in the inner ear (utricle, saccule, and three semicircular canals) adjacent to the cochlea.

 

Proprioception & Kinesthesia: Proprioception is the perception of body position, while kinesthesia is the tracking of the body's actual movement through space. Both rely on receptors that detect stretch and tension in muscles, joints, skin, and tendons.

Signs of ear infection

Possible causes

1. Outer Ear Infection (Otitis Externa)

Often called "swimmer's ear."

Symptoms can include:

• Ear pain
• Itching
• A feeling of wetness
• Fluid or pus draining from the ear
• A foul smell
• Reduced hearing if the ear canal becomes swollen

This type of infection is usually caused by bacteria, but fungi can also be responsible.

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2. Middle Ear Infection (Otitis Media)

A middle ear infection can sometimes cause:

• Ear pain
• Pressure
• Fever
• Temporary hearing loss
• Fluid behind the eardrum

If the eardrum ruptures (bursts), fluid or pus may drain from the ear, sometimes with an unpleasant smell. After the pressure is relieved, the pain may actually lessen.

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3. Earwax Mixed with Infection

Earwax itself usually has only a mild odor.

However, if wax becomes mixed with:

• bacteria,
• dead skin cells,
• or infected drainage,

it can develop a stronger, unpleasant smell.

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4. Fungal Ear Infection

Fungal infections are less common than bacterial ones but can cause:

• Itching
• Thick discharge
• A musty or unpleasant smell
• A feeling of fullness in the ear

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Why You Were Given Antibiotics

During the COVID-19 pandemic, many GP surgeries had to assess patients by telephone or video because face-to-face appointments were limited.

If your GP felt your symptoms suggested a bacterial ear infection, they may have prescribed antibiotics without examining the ear directly, particularly if you described:

• ear discharge,
• pain,
• a bad smell,
• or signs of infection.

Sometimes this approach was necessary because of the circumstances at the time.

Your Description

You mentioned:

• your ears smelled,
• it felt like liquid was in your ears,
• you couldn't get a face-to-face GP appointment,
• you were prescribed antibiotics.

Those symptoms would be consistent with an ear infection, although other conditions can produce similar symptoms. If the antibiotics cleared the problem, that makes a bacterial infection one possible explanation, but it doesn't prove it.

When to Seek Medical Care

If similar symptoms happen again, it's a good idea to seek medical advice, especially if you have:

• Ear discharge that is yellow, green, bloody, or foul-smelling.
• Severe ear pain.
• Hearing loss.
• Dizziness or problems with balance.
• Fever.
• Symptoms that last more than a couple of days or keep coming back.

A healthcare professional can look inside the ear with an otoscope to see whether the problem is in the outer ear, middle ear, or another part of the ear.

From what you've described, it sounds as though your GP managed the situation as best they could during the restrictions of the COVID-19 period. Many people experienced similar telephone assessments when in-person examinations were limited. If the symptoms have completely resolved since then, there's usually no need for concern, but if they recur, an examination of the ear would be the best way to identify the cause.

yer my ears ere itching like crazy.

That extra detail makes an outer ear infection (otitis externa, or "swimmer's ear") a possibility, although it's impossible to know for certain without having examined your ear at the time.

The combination of symptoms you described:

• ✅ Intense itching
• ✅ A feeling of liquid or wetness in the ear
• ✅ An unpleasant smell
• ✅ Being prescribed antibiotics
• ✅ It happening during the COVID period when GPs often assessed patients remotely

is a pattern that can occur with an infection of the ear canal.

However, itching can also be caused by other conditions, such as:

• Eczema or dry skin in the ear canal
• Fungal ear infections, which are often very itchy and can produce discharge
• An allergic reaction (for example, to earbuds, hearing aids, or hair products)
• Wax irritation

If the antibiotics improved your symptoms, that suggests the GP may have suspected a bacterial infection. On the other hand, if it had been a fungal infection, antibiotics alone might not have helped and could sometimes even make it worse.

If it ever happens again

It's best to have your ear examined by a healthcare professional rather than trying to clean it yourself. In the meantime:

• Don't insert cotton swabs (Q-tips) or other objects into the ear.
• Try to keep the ear dry until you've been assessed.
• Seek prompt medical advice if you notice severe pain, fever, hearing loss, or discharge with a strong odor.

Since we've been talking about hearing and the ear, your experience is actually a good real-life example of how problems in the outer ear can affect hearing. If the ear canal becomes swollen or filled with wax or discharge, sound has more difficulty reaching the eardrum, which can cause a temporary reduction in hearing. Once the infection or blockage clears, hearing often returns to normal if there has been no damage to the deeper parts of the ear.

 A bad smell, fluid or discharge, and a wet feeling can be caused by several conditions.

 

Possible causes

1. Outer Ear Infection (Otitis Externa)

 

Often called "swimmer's ear."

 

Symptoms can include:

 

Ear pain

Itching

A feeling of wetness

Fluid or pus draining from the ear

A foul smell

Reduced hearing if the ear canal becomes swollen

 

This type of infection is usually caused by bacteria, but fungi can also be responsible.

 

2. Middle Ear Infection (Otitis Media)

 

A middle ear infection can sometimes cause:

 

Ear pain

Pressure

Fever

Temporary hearing loss

Fluid behind the eardrum

 

If the eardrum ruptures (bursts), fluid or pus may drain from the ear, sometimes with an unpleasant smell. After the pressure is relieved, the pain may actually lessen.

 

3. Earwax Mixed with Infection

 

Earwax itself usually has only a mild odor.

 

However, if wax becomes mixed with:

 

bacteria,

dead skin cells,

or infected drainage,

 

it can develop a stronger, unpleasant smell.

 

4. Fungal Ear Infection

 

Fungal infections are less common than bacterial ones but can cause:

 

Itching

Thick discharge

A musty or unpleasant smell

A feeling of fullness in the ear

Why You Were Given Antibiotics

 

During the COVID-19 pandemic, many GP surgeries had to assess patients by telephone or video because face-to-face appointments were limited.

 

If your GP felt your symptoms suggested a bacterial ear infection, they may have prescribed antibiotics without examining the ear directly, particularly if you described:

 

ear discharge,

pain,

a bad smell,

or signs of infection.

 

Sometimes this approach was n

Examples of communication

 

Communication Method	Mainly Used By	Uses
Makaton	People with learning disabilities, autism, speech and language difficulties, and some children	Signs, symbols, and speech together to support communication.
British Sign Language (BSL)	Many Deaf people in the UK	A complete language with its own grammar and vocabulary.
American Sign Language (ASL)	Many Deaf people in the US and parts of Canada	A complete language that is different from BSL.

An important point for your book is that gestures are not the same as sign language. Many people naturally use gestures that almost everyone understands, such as:

• 🍽️ Pointing to your mouth or miming eating to mean "Dinner is ready."
• 👍 Thumbs up for "OK."
• 👋 Waving for "Hello" or "Goodbye."
• 👉 Pointing to indicate a direction.

These everyday gestures can be very helpful, especially between family members who know each other well. However, BSL and ASL are full languages, not just collections of gestures.

Your experience with your stepdad is actually a nice practical example you could include in your communication chapter. For example:

Real-Life Example

Sara's stepdad is deaf. When dinner is ready, instead of calling out, she often makes an eating gesture with her hand. He understands this immediately because it is a clear visual cue. This shows that simple visual communication can sometimes be more effective than spoken words.