Nervous System Flashcards Preview

Functional Anatomy I > Nervous System > Flashcards

Flashcards in Nervous System Deck (26)
Loading flashcards...
1

Function of Nervous System

controls, stimulates, and coordinates all other body movements

2

Neuron

fundamental unit of nervous tissue

3

Dendrites

fiber branches that receive impulses from other parts of the nervous system and bring the impulses toward the cell body

4

Axons

transmit impulses away from the cell body

5

Myelin

fatty covering over axons

6

node of Ranvier

break in the myelin every half millimeter

7

Gray matter

areas that contain mostly UNmyelinated fibers

8

White matter

areas that contain mostly MYELINATED fibers

9

Nerve fiber

conductor of impulses from the neuron

10

Synapse

small gap between neurons involving very complex physiological actions

11

Tract

group of myelinated nerve fibers within the CNS that carries a specific type of information

12

Motor (efferent) neuron

large cell body & multibranched dendrites, long axon
Located within the ANTERIOR horn of the spinal cord
Conducts impulses from the spinal cord to the periphery

13

Sensory (afferent) neuron

dendrite arises in the skin
Runs into the POSTERIOR root ganglion
Impulses from periphery to spinal cord

14

CNS

brain & spinal cord

15

Brain components

cerebrum
brainstem
cerebellum

16

Cerebrum

largest, main portion of the brain
Highest mental functions

17

Cortex

outer coating that is many cell layers deep, divided into four lobes

18

Lobes of the Cortex

Frontal lobe
Occipital lobe
Parietal lobe
Temporal lobe

19

Frontal lobe

personality
motor movement & expressive speech

20

Occipital lobe

vision and recognition of size, shape, & color

21

Parietal lobe

gross sensation (touch & pressure)

22

Temporal Lobe

behavior, hearing, language reception, and understanding

23

Thalamus

relay station for body sensations

24

Hypothalamus

hormone function and behavior

25

Basal ganglia

coordination of motor movement

26

Brainstem

midbrain
pons
medulla oblongata