Quiz 8 - CNS: Brain Flashcards Preview

Anatomy > Quiz 8 - CNS: Brain > Flashcards

Flashcards in Quiz 8 - CNS: Brain Deck (27):
1

facts about brain

CNS - brain and spinal cord
brain contains ~ 20 billion neurons
each neuron makes 1-10,000 synapses with other neurons

2

major regions of the brain

cerebrum
diencephalon
brain stem
cerebellum

3

cerebrum

paired hemispheres consisting of the cortex, white matter and basal nuclei

4

parts of cerebral cortex

sulci, gyri, and fissures

5

sulci

shallow grooves

6

gyri

ridges

7

fissures

deep grooves

8

what are the cerebral lobes divided by

sulci

9

cerebral lobes

frontal
parietal
temporal
occipital

10

frontal lobe

primary motor cortex
somatic motor association cortex
prefrontal cortex

11

primary motor cortex

direct voluntary movements by controlling somatic motor neurons

12

somatic motor association cortex

coordinates motor activities of learned movement patterns

13

parietal lobe

primary sensory cortex
somatic sensory association cortex

14

primary sensory cortex

receives somatic sensory information (ex: touch, pain, taste, temperature, pressure, etc.)

15

somatic sensory association cortex

integrate and process sensory data (ex: comprehend size, form and texture of objects)

16

temporal lobe

auditory cortex
olfactory cortex

17

auditory cortex

hearing, perception of sound

18

olfactory cortex

smell, perception of odors

19

occipital lobe

visual cortex - vision and coordination of eye movement

20

layers of cerebrum

gray matter and central white matter

21

gray matter

outer layer, occupy majority of cell body

22

central white matter

consists of deep myelinated fibers

23

what makes connections within same hemispheres

association fibers

24

arcuate fibers

short fibers connecting one gyrus to another

25

longitudinal fasciculi

connect frontal lobe to other lobes

26

commissural fibers

make connections between hemisphere
- corpus callosum
- anterior commissure

27

alzheimers disease

progressive degenerative brain disease
- 5-15% > 65 years old develop AD
- 50% > 80 years old develop AD
- abnormal protein deposits within neurons in brain; leads to nerve cell death and tissue loss