ENG definition Nervous system

Alzheimer’s disease

the most common form of dementia among old folk

aqueous humor

the clear, watery fluid located in the front part of the eye between the cornea and the lens

cataract

a clouding of the lens in the ey

central nervous system

made up of the brain and spinal cord

cerebral palsy

a group of disorders that affect a person’s ability to move and maintain balance and posture

cerebrospinal fluid

a clear, watery liquid that flows around and inside the brain and spinal cord to cushion them from injury

cochlea

a snail-shell-shaped, fluid-filled structure in the inner ear that converts sound vibrations into electrical nerve impulses for the brain

conjunctivitis

pink eye, inflammationn of the outer layer of eye and inside eyelid

cornea

the clear, dome-shaped outer layer at the very front of the eye that covers the pupil and iris

deep brain stimulation DBS

electrodes surgically implanted in the brain, sennd electrical pulses to stimulate part of the brain that controls movement

dementia

an umbrella term for a group of brain changes that cause a gradual loss of memory, thinking skills, and the ability to do everyday tasks

ear

the organ of hearing and balance in humans and animals

ear drum

a thin flap of skin that stretches tight like a drum and vibrates when sound hits, separates your outer ear from your middle ear

electroencephalogram EEG

recording electrical activity of the brain

epilepsy

Disorder that causes people to have recurring seizures

Eustachian tube

a small canal that connects your middle ear to the back of your nose and upper throat

glaucoma

fluid pressure inside the eye slowly raise, can lead to blindness, a group of disease that can damage the eye’s optic nerve

headache

a pain in any region of the head, scalp, or neck

inner ear

the innermost part of the ear responsible for hearing and balance

motor nerves

bundles of nerve fibers that transmit movement signals from the central nervous system to muscles and glands

otorhinolaryngologist

ear nose throat doctor

nerve cells

a special type of cell that sends and receives electrical and chemical messages throughout your body

nerve impulses

an electrical and chemical signal that travels along a nerve cell to let different parts of the body communicate

Neurologist

doctor who diagnoses and treats problems in the brain, spinal cord, and nerves

ophthalmologist

doctor special in the health of eye and vision care, incluse surgery

optic nerve

cable-like nerve fiber that carries visual messages from the retina at the back of the eye to the brain

optometrist

professional who examines eyes, tests vision, and prescribes corrective lenses like glasses or contact lenses

outer ear

the visible, outermost part of the body that collects sound waves and guides them inward toward the eardrum

pakinson disease

a movement disorder due to lack of dopamine

peripheral nervous system

the network of nerves outside your brain and spinal cord that connects them to the rest of your body

poliomyelitis

polio, an infectious disease that live in the throat and intestines, contagious disease that attacks the nervous system and can cause permanent paralysis or death

pupil

eye part that wider in dim light, the dark opening in the center of the eye that lets in light

refractive error

vision problem when eye cant focus well, Due to an abnormal shape or length of the eye, light does not focus on the retina

retina

the light-sensitive layer of tissue at the back of the inner eye that converts incoming light into electrical signals for the brain

sensory nerve

pick up message from the outside of the body and pass them to the brain

spinal cord injury

damage to the bundle of nerves running down the spine that blocks or disrupts signals between the brain and the rest of the body

stroke

a medical emergency that happens when blood stops flowing to a part of the brain

lumbar puncture LP

spinal tap, when a sample of the cerebrospinal fluid CSF) is taken through an incision between two vertebrae

transient ischemic attack TIA

mini stroke, when blood supply to the brain is briefly interupted

vitreous humor

a clear, jelly-like substance that fills the space between the lens and the retina inside the eye

iris

the colored part of the eye

cerebrovascular accident CVA

stroke, when blood flow to the brain stop

near sightedness

myopia

far sightedness

presbyopia

seizures

abnormal electrical activity in the brain