The Eye and the Brain
- Created by: Abc312
- Created on: 10-06-18 18:58
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- The Brain and the Eye
- The Brain
- Controls complex behaviour
- Made of billions are interconnected neurones
- It has three different regions:
- Cerebral cortex
- Outer wrinkly bit- controls consciousness,intelligence, memory and language
- Medulla
- Controls unconscious activies
- The brain stem
- Cerebellum
- Controls muscle Coordination
- Cerebral cortex
- Investigating the Brain
- Consequences
- Can help in developments for treatments in brain diseases
- Can cause damage such as speech impairments
- Consequences
- The Eye
- Sense organ containing light and colour receptive sensors
- Iris Reflex
- When bright light is detected
- The circular muscles in the iris contract and the radial muscles relax
- This makes the pupil smaller reducing the light going throughout
- The circular muscles in the iris contract and the radial muscles relax
- When bright light is detected
- Accommodation
- Near objects
- Ciliary muscles contract, slackens the suspensory ligaments
- Lens becomes fat
- Increases the amountrefractslight
- Lens becomes fat
- Ciliary muscles contract, slackens the suspensory ligaments
- Distant objects
- Ciliary muscles relax allowing the suspensory ligaments to pull tight
- The lens is less thin
- Refracts light by a smaller amount
- The lens is less thin
- Ciliary muscles relax allowing the suspensory ligaments to pull tight
- Near objects
- Structure
- Retina
- Back of the eye which contains the receptor cells
- Optic nerve
- Carries impulses from the receptors on the retina to the brain
- Sclera
- Tough, supporting wall
- Cornea
- Transparent outer layer at the front of the eye - it refracts the light
- Iris
- Contains muscles that can control the diameter of the pupil
- Ciliary muscles and suspensory ligaments
- Control the shape of the lens
- Retina
- The Brain
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