The Nervous System

Nerve cell. Basic unit of the nervous system

Supportive tissue of the nervous system

Large part of cell made up of cytoplasm and the nucleus

Central controlling unit within a living cell

Short receptive fibers that branch out from a cell's body

A long dtraight fiber with a brush like tip that conducts impulses away from the cell body

White fatty material that forms a sheath around most axons

Neurons that carry signals to the brain and spinal cord

Neurons that stimulate the contraction or relaxation of muscles and spur the activities of glands

neurons that shuttle messages back and forth through pathways

junction between neurons

brain and spinal cord

cranial and spinal nerves

system concerned with activities conducted automatically by certain peripheral nerves

membranes that cover the brain and spinal cord

outer membrane of meninges

webline membrane between the dura mater and the pia mater of the meninges

inner membrane of meninges

largest part of the brain

outer surface of the cerebrum that is responsible for the generation of impulses

folds of cortex forming elevated portions

depressions or grooves thtat seperate convulutions

also known as somatic motor area. anterior lobe of the brain that controls voluntary muscles. Left side governs the right side orf the body and the muscles involved in speech. The right side governs the left side of the body, personality and planning and judgment.

watery substance in the ventricals or the brain that cushions and protects the brain and flows throughout the brain and around the spinal cord

nerve, nervous system

head

cerebelum

brain

horn-shaped

head, skull

dura mater

brain

meninges

pons

thalamus

swelling

marrow, spinal cord

vertebra

to be carried from one place in the body to a central part of the body

lobe of the brain that contains the sensory areas and determines distance, size, shape, taste and the sensory aspects of speech. Also known as the somatic sensory area

lobe of the brain that contains the auditory center for hearing impulses and determines the sense of smell, memory, and learning

posterior lobe of the brain that governs vision

cavity of the brain extending from the frontal portion of the cerebral hemisphere to the posterior lobe. It has a horn like projection. There are 2; one in each hemisphere.

Horn like projection of the lateral ventricle reaching into the frontal, occipetal, and temporal lobes

The smallest. Communicates with the lateral ventricals

Communicates with the central canal of the spinal cord and sub arachnoid space.

Located at the upper part of the brainstem, above the pons. connects the lower brain centers to the highter centers. contains optix reflex centers and serves to correlate optic and touch impulses

Or bridge. Located betweeen the midbrain and the medulla oblangata. Contains the nerve tracks fromt he right and left halves of the cerebellum

one part of the brainstem that regulates heart action, breathing and circulation. 8 pairs of cranial nerves.

second largest division of the brain; "little brain"

central portion of the cerebellum

section of the brain between the midbrain and the cerebrum

part of the diencephalon where nerve fibers from the spinal cord and lower part of the brain synapse with neurons leading to the cerebrum

part of the diencephalon that contains centers for the control of body temperature, corbohydrate metabolism, and emotions that affect heartbeat, blood pressure, appetite, and sexual reflexes

part of the diencephalon that contains the pineal body

reflex activities: involves the translation of a sensory message entering the cord into a motor message as it leaves

pathway: the spinal cord seves as a pathway for conducting sensory and motor impulses

cervical, thoracic, lumbar, and sacral

part of the composition of spinal nerves of both the autonomic and voluntay nervous systems

divisions of the spinal nerve that enter the spinal cord at different points

cluster of nerve cell bodies

interlocking network or nerves

smell impulses to the brain

vision

eye muscles and the pupil

one eyeball muscle on each side

sensory nerve of the face and head

eyeball muscle

largely motor to the face

balance and hearing

taste, saliva secretion, swallowing

most organs in the thoracic and abdominal cavities

two muscles of the neck

muscles of the tongue