chapter 12 and 13 Flashcards Preview

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Flashcards in chapter 12 and 13 Deck (29):
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neuroplasty

surgical repair of the nerves

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cranial nerves

nerves that arise from the brain

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cerebellum

second largest portion of the brain located beneath posterior portion of the cerebrum aids in coordinating voluntary part of body movements & maintaining balance and equilibrium

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hypothalamus

portion of diencephalon that lies just below thalamus, controls body tempature, appetite, sleep, sexual desire & emotions such as fear also releases hormones from the pituitary gland & regulates parasympathetic & sympathetic nervous systems.

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Dura Mater

term means tough mother; is fibrous outermost meanings layers that forms a tough protective layer

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pia mater

term means soft mother; this thin innermost meninges layer is applied directly to the surface of brain

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Arachnoid layer

Delicate middle layer of meninges

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Axon

Single projection of a neuron

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Myelin

Tissue that wraps around many of nerve fibers ; composed of fatty material and functions as isolated

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Gyri

Convulted, elevated portions of cerebral cortex; they are separated by fissures & sulci

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Sulci

Also called fissures; grooves that separate gyri of cerebral cortex; singular is sulcus

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ventricle

brain has four interconnected cavities called ventricles

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Synapse

Point at which axon of the neuron meets dendrite of next neuron

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Stroke

Developed of an infraction due to loss in blood supply to an area of the brain

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Bell's Palsy

One sided facial paralysis due to inflammation of facial nerve, probably viral in nature

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Brain stem

This area of the brain has three components: medulla oblongata, pons, and mid brain... Brain stem is pathway for impulses to be conducted between brain and spinal cord-also controls respiration, heart rate, and bold pressure

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Coma

Profound unconsciousness resulting from illness and injury

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Diplopia

Double vision

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Ophthalmoscope

Instrument to view inside of eye

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Blepharoplasty

Surgical repair of the eyelid

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Audiogram

Chart that shows faintest sounds patients can hear during auditory testing

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Lacrimal apparatus

Consists of lacrimal gland, lacrimal ducts and nasolacrimal ducts

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Cornea

Portion of sclera that is clear and transparent allows light to enter interior of eye and Aldo plays role in bending light

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Rods

Sensory receptors of retina that are active in dim light and do not perceive color

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Lens

Transparent structure behind pupil and iris; functions to bend light rays so they land on the retina

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Auditory tubes

Another name for Eustachian tubes- connecting middle ear and pharynx

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Cochlea

Portion of labyrinth associated with hearing; is rolled in shape of snail shell

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Nystagmus

Jerky appearing involuntary eye movements

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Auricle

Pertaining to the ear