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Flashcards in midterm 3 Deck (33):
1

3rd ventricle

is a little more than a thin vertical pocket of fluid below and medial to the lateral ventricles

2

4th ventricle

is a tiny diamond shape space where the cerebellum attaches to the brainstem; it is a slight expansion of the central canal extending up from the spinal cord

3

Formation of the cerebrospinal fluid

formation occurs by separation of fluid from blood in the choroid plexuses

4

Cerebrospinal fluid (CSF) circulation

it is formed by the separation of fluid from blood in the choroid plexuses into the ventricles of the brain, circulates through the ventricles and into the central canal and subarachnoid spaces and absorbed into the blood.

5

Structure of the spinal cord

lies w/in the spinal cavity, from the forma magnum to the lower border of the first lumbar vertebra; distance of about 45 cm; is oval shaped cylinder that tapers slightly and has two bulges, one on the cervical region, one in the lumbar region

6

function of lateral spinothalamic

pain, temp, and crude touch on the opposite side

7

function of anterior spinothalamic

crude touch and pressure

8

function of Fasciculi Gracilis and cuneatus

Discriminating touch and pressure sensations, including vibration, stereognosis, and two point discrimination; conscious kinesthesia

9

Structure of the brain

largest organ; 100B neurons and 900B glia; 1.4kg (3lbs);

10

6 major divisions of the brain

medulla oblongata, pons, midbrain, cerebellum, diencephalon and cerebum

11

The pyramids

are two bulges of white matter located on the ventricle surface of the medulla

12

In the Midbrain, the corpaquadrigemina are

two inferior colliculi and two superior colliculi

13

the two sets of twin colliculi form

form the posterior, upper part of the midbrain , the part that lies just above the cerebellum

14

Two other midbrain structures

are the red nucleus and the substantia negra

15

location of the cerebellum

located just below the posterior portion of the cerebrum; transverse fissure separates these two parts of the brain

16

Diencephalon

located btwn the cerebrum and the midbrain; consists of sereral structures located around the third ventricle

17

Diencephalon consists of

the thalamus, hypothalamus, optic chiasma and pineal gland

18

Structure of the cerebrum

the largest and uppermost division of the brain; consist of two halves, right and left cerebral hemispheres; made up of gray matter only; 2-4 cm thick

19

five lobes of Cerebrum

frontal, parietal, temporal, occipital, insula (island of Riel)

20

Basal Nuclei are

islands of gray matter located deep inside the white matter of each hemisphere

21

Basal Nuclei include

cuadate nucleus, Lentiform nucleus, Amygdaloid nucleus

22

Cerebral tracts

make up cerebrum's white matter

23

3 types of cerebral tracts

projection, association, commissural tracts

24

The precentral gyrus

the most posterior gyrus of the frontal lobe, constitutes the primary somatic area

25

Location of the 3 sensory neurons

the cerebral cortex

26

3 sensory neurons in the cerebral cortex

primary, secondary and tertiary sensory neurons

27

Pyramidal tracts

or corticospinal tracts; are those whose fibers come together in the medulla to form the pyramids

28

extrapyramidal tracts

consist of all motor tracts from the brain to the spinal cord anterior horn motor neurons except the corticospinal (pyramidal)

29

extrapyramidal tracts conduction plays

a part in producing large, automatic movements, and emotional expression

30

Four plexus formed from anterior rami

Cevical, brachial, lumbosacral, coccygeal plexus

31

Spinal nerves of cervical plexus

C1- C4

32

Spinal nerves of brachial plexus

C5- C8

33

Cervical plexus= spinal nerve branches from cervical plexuses

Phrenic nerve