midterm 3

Question 1

3rd ventricle

Answer 1

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

Question 2

4th ventricle

Answer 2

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

Question 3

Formation of the cerebrospinal fluid

Answer 3

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

Question 4

Cerebrospinal fluid (CSF) circulation

Answer 4

fluid circulates in the subarachnoid space and then is absorbed into venous blood through the arachnoid villi

Question 5

Structure of the spinal cord

Answer 5

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

Question 6

function of lateral spinothalamic

Answer 6

pain, temp, and crude touch on the opposite side

Question 7

function of anterior spinothalamic

Answer 7

crude touch and pressure

Question 8

function of Fasciculi Gracilis and cuneatus

Answer 8

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

Question 9

Structure of the brain

Answer 9

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

Question 10

6 major divisions of the brain

Answer 10

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

Question 11

The pyramids

Answer 11

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

Question 12

In the Midbrain, the corpaquadrigemina are

Answer 12

two inferior colliculi and two superior colliculi

Question 13

the two sets of twin colliculi

Answer 13

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

Question 14

Two other midbrain structures

Answer 14

are the red nucleus and the substantia negra

Question 15

location of the cerebellum

Answer 15

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

Question 16

Diencephalon

Answer 16

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

Question 17

Diencephalon consists of

Answer 17

the thalamus, hypothalamus, optic chiasma and pineal gland

Question 18

Structure of the cerebrum

Answer 18

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

Question 19

five lobes of Cerebrum

Answer 19

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

Question 20

Basal Nuclei

Answer 20

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

Question 21

Basal Nuclei include

Answer 21

cuadate nucleus, Lentiform nucleus, Amygdaloid nucleus

Question 22

Cerebral tracts

Answer 22

make up cerebrum’s white matter

Question 23

3 types of cerebral tracts

Answer 23

projection, association, commissural tracts

Question 24

The precentral gyrus

Answer 24

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

Question 25

Location of the 3 sensory neurons

Answer 25

the cerebral cortex

Question 26

3 sensory neurons in the cerebral cortex

Answer 26

primary, secondary and tertiary sensory neurons

Question 27

Pyramidal tracts

Answer 27

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

Question 28

extrapyramidal tracts

Answer 28

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

Question 29

extrapyramidal tracts conduction plays

Answer 29

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

Question 30

Four plexus formed from anterior rami

Answer 30

Cevical, brachial, lumbosacral, coccygeal plexus

Question 31

Spinal nerves of cervical plexus

Answer 31

C1- C4

Question 32

Spinal nerves of brachial plexus

Answer 32

C5- C8

Question 33

Cervical plexus spinal nerve branches from plexuses

Answer 33

Phrenic nerve