Primer lecture

Question 1

Nissl substance

Answer 1

RER and ribosomes

Question 2

pseudounipolar

Answer 2

1 axonal process coming down which bifurcates with one going to PNS and the other to CNS. Our sensory neurons in peripheral ganglia. No synapses on soma. diverse sensory functions.

Question 3

oligodendrocytes

Answer 3

CNS. Makes myelin

Question 4

Schwann Cells

Answer 4

PNS. Makes myelin

Question 5

motor axons (skeletal muscle)

Answer 5

= myelinated

Question 6

sensory axon (fine touch)

Answer 6

myelinated

Question 7

Proprioception

Answer 7

myelinated

Question 8

sensory axon (pain)

Answer 8

unmyelinated

Question 9

Motor neurons (cardiac and blood vessels)

Answer 9

unmyelinated

Question 10

continuation

Answer 10

Cranial ventricles are continuous with central cord in spinal cord

Question 11

dura mater

Answer 11

Attached to cranium, lines fossa. Outer, collagen rich layer. Some areas split into two to form sinuses. They are venous spaces, allowing venous blood to exit the brain and head.

Question 12

Falx Cerebri

Answer 12

Two dural reflections that separates the L and R hemisphere along horizontal fissure.

Question 13

Tentorium Cerebri

Answer 13

dural reflections separating cerebellum from occipital lobe

Question 14

Arachnoid mater

Answer 14

Contains CSF, baths brain and provides buoyancy and mechanical protection.

Question 15

Pia mater

Answer 15

Thin innermost layer, hugs sucli and gyri

Question 16

1st/2nd ventricle

Answer 16

Make lateral ventricles which follow inside of cerebrum. Has lateral horn that follows frontal lobe, posterior horn that is surrounded by occipital, inferior horn that is deep to temporal lobe.

Question 17

3rd ventricle

Answer 17

Attached to lateral ventricle to inter-ventricular foramen. Forms cavity in diencephalon.

Question 18

4th ventricle

Answer 18

Attached to 3rd ventricle via cerebral aqueduct which runs through middle of midbrain. Cerebellum is dorsal and ventral is pons and medulla.

Question 19

CSF production

Answer 19

CSF fills ventricles and is made by choroid plexus on eppendymal cells mostly in lateral and 4th ventricle.

Question 20

Path of CSF around brain

Answer 20

Foramens in ventricular space allow CSF to travel to subarachnoid space and surround brain. There are arachnoid granulations which allows CSF to travel to superior sagittal sinus then around the brain. Where superior sagittal sinus is is also where arachnoid granulations are.

Question 21

Cerebral cisterns

Answer 21

Enlarged areas of subarachnoid space where CSF can pool