Chapter 15: Brain and Cranial Nerves Flashcards Preview

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Flashcards in Chapter 15: Brain and Cranial Nerves Deck (84)
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1

What are the 6 regions of the adult brain?

Cerebrum
Diencephalon
mesencephalon
Cerebellum
Pons
Medulla Oblongata

2

Describe the dura mater (3)

outer-most mater
forms internal periosteum of skull
no epidura

3

What are the three dura mater partitions? what does each separate?

Falx Cerebelli: separates right and left cerebellar hemispheres
Falx Cerebri: separates right and left cerebral hemispheres
Tentorium Cerebelli: separates lobes of cerebrum from cerebellum

4

describe the arachnoid mater (2)

-spidery
-spreads over brain but doesn't extend into grooves and depressions

5

describe the pia mater (3)

-inner most mater
-aids in nourishing brain
-attached to surface of brain

6

what are ventricles? how many are there?

spaces filled with CSF; 4

7

Where are each of the 4 ventricles connected?

-2 lateral ventricles connected by interventricular foramen to the 3rd ventricle connected by cerebral aqueduct to the 4th ventricle connected to central canal of spinal cord

8

What are the functions are CSF? (3)

-Cushions
-Transport nutrients, wastes, and other chemicals
-Supports the brain

9

what is the location of CSF formation?

choroid plexus

10

what is the choroid plexus?
what does it consist of?

lobes located in the ventricles
consists of ependymal cells and permeable capillaries

11

CSF is taken from ________ by________ cells and pooled in the ___________

blood; ependymal; ventricles

12

True or False: CSF moves entirely though out the CNS and PNS

false; only through the entire CNS not PNS

13

Where does CSF movement originate?

ventricles

14

the CSF moves through ________ in the 4th ventricle to sub-arachnoid space

apertures

15

CSF moves though the _______ and around the _________

central canal; subarachnoid space

16

CSF is reabsorbed in the _________

sagittal sinus

17

describe the sagittal sinus (4)

-a large venous tube within the dura mater
-extends along the midline of the cerebral hemispheres
-arachnoid extends into sinus through arachnoid granulations
-CSF goes back to the blood

18

what are the five functions of the cerebrum?

-interpret sensory impulses
-voluntary muscular movements
-memory
-reasoning process
-intelligence and personality

19

the two cerebral hemispheres are connected by the _______ and separated by the ________

corpus callosum
longitudinal fissure

20

what is the name for the ridges in the cerebrum?
Grooves?

Gyri- ridges
Sulci-grooves

21

other than connecting the two cerebral hemispheres, what else does the corpus callosum do?

allows for communication between the hemispheres

22

describe the hemisphere specialization for the two hemispheres of the cerebrum

one hemisphere receives sensory and generates motor information to the opposite side of the body of that hemisphere

23

describe cerebral gray matter (3)

Cell Somas
-outer regions of cerebral lobes
-centralized in masses called basal nuclei
(slide14)

24

does the cerebral gray or white matter have myelinated axons?

white matter

25

what are the three fibers located in the cerebral white matter? describe them

Commissural fibers: connect corresponding gray areas on different hemispheres
Association fibers: connect different parts of same hemisphere
Projection fibers: connect cerebrum to lower brain areas

26

what are the 5 cerebral lobes

-Frontal
-Parietal
-Temporal
-Occipital
-Insula

27

What is the sulci that separates the frontal lobe from the parietal lobe ?

Central Sulcus

28

what is the sulci that separates the parietal lobe from the temporal?

Lateral sulcus

29

what is the sulci that separates the parietal lobe from the occipital?

Parieto-occipital sulcus

30

describe the primary motor cortex (4)

-Anterior to central sulcus in frontal lobe
-conscious control of skeletal muscles
-learned motor skills
-speech and eye movements