Lecture 1

Question 1

T/F- Upper motor neurons mostly remain in the CNS

Answer 1

False- they always in CNS, they dont depart to the PNS

Question 2

Where are the cell bodies of the lower motor neurons located in?

Answer 2

CNS. But their axons project out to the PNS

Question 3

What is a motor unit?

Answer 3

group of muscle fibres innervated by one neuron

Question 4

What are the layers of the nerve, (from biggest to smallest)?

Answer 4

Nerve fibre, endoneuriem, perineurium, epineurium

Question 5

Within the nerve, axons are sub-grouped into fasicicles, surrounded by a \_\_\_\_\_\_\_\_\_\_\_?
A) Perineurial sheath
B) Flexor Retinaculum
C) endoneurium
D) Epineurium

Answer 5

A- Perineual Sheath

Question 6

How many pairs of spinal nerves are they? How many for cervical, thoracic, lumbar, sacral and coccygeal?

Answer 6

31 pairs of spinal nerves, 8 pairs of cervical, 12 pairs for thoracic, 5 pairs of lumbar, 5 pairs of sacral, 1 pair of coccygeal

Question 7

Where does spinal nerve originate from? what about cranial nerve?

Answer 7

Spinal- from Spinal cord

Cranial- Brain and brainstem

Question 8

Sensory axons join the CNS via a \_\_\_\_\_\_\_ root,  and motor axons join at a \_\_\_\_\_\_\_\_\_ root
A) Ventral, Dorsal
B) Dorsal, Ventral
C) Lateral, Medial
D) Medial, Lateral

Answer 8

B- Dorsal, Ventral

Question 9

T/F- Ganglia of dorsal root is contained in the dorsal root ganglia

Answer 9

True

Question 10

Ventral root innervate _______ part of the body whereas Dorsal root innervate _______ part of the body

A) Anterior, Posterior
B) Lateral, Medial
C) Medial, Posterior
D) Posterior, Anterior

Answer 10

A- Anterior, Posterior

Question 11

T/F- Spinal nerves contain only sensory nerves

Answer 11

False- are mixed

Question 12

What is a dermatome?

Answer 12

Area of skin that is mainly supplied by a single spinal nerve

Question 13

What is a myotome?

Answer 13

Group of muscles that a single spinal nerve innervates

Question 14

T/F- A peripheral nerve is often compromised of multiple spinal nerves.

Answer 14

True

Question 15

In the brachial plexus, which spinal nerves form the Upper trunk?

Answer 15

C5 and C6

Question 16

In the brachial plexus, which spinal nerves form the middle trunk?

Answer 16

C7

Question 17

In the brachial plexus, which spinal nerves form the Lower trunk?

Answer 17

C8 and T1

Question 18

In the brachial plexus, which cord/s form the musculocutaneous nerves?

Answer 18

Lateral Cord

Question 19

In the brachial plexus, which cord/s form the median nerves?

Answer 19

Lateral and Medial

Question 20

In the brachial plexus, which cord/s form the ulnar nerves?

Answer 20

Lateral and Medial

Question 21

In the brachial plexus, which cord/s form the radial nerves?

Answer 21

Posterior

Question 22

In the brachial plexus, which cord/s form the axillary nerves?

Answer 22

Posterior

Question 23

What spinal nerves innervate musculocutanous nerve:?

Answer 23

C5,6,7

Question 24

What spinal nerves innervate median nerve:?

Answer 24

C5,6,7,8 T1

Question 25

What spinal nerves innervate ulnar nerve:?

Answer 25

C8, T1

Question 26

What spinal nerves innervate radial nerve:?

Answer 26

C5,6,7,8, T1

Question 27

What spinal nerves innervate Axillary nerve:?

Answer 27

C5,6

Question 28

Name the 12 cranial nerves in order.

Answer 28

Olfactory, Optic, Oculomoter, Trochlear, Trigeminal, Abducens, Facial, Vestibulocochelar, Glossopharyngeal, Vagus, Accessory, Hypoglossal

Question 29

Which Cranial nerves come from cerebral hemisphere?

Answer 29

Olfactory and Optic

Question 30

Which Cranial nerves come from the midbrain?

Answer 30

oculomoter and trochlear

Question 31

Which Cranial nerves come from pons?

Answer 31

Trigeminal, Abducens, Facial, Vestibulocochlear

Question 32

Which Cranial nerves come from medulla?

Answer 32

Vestibulocochlear, vagus, accessory, hypoglossal

Question 33

Which cranial nerves are sensory?

Answer 33

Olfactory, optic, Trigeminal, glossopharyngeal, vestibulocochlear,

Question 34

Which cranial nerves are motor?

Answer 34

Glossopharyngeal, Vagus, Hypoglossal, Accessory, Facial, Trigeminal, Abducens, Trochlear, Oculomotor,

Question 35

Sympathetic outflow is ________ whereas PNS is ________ outflow.

Answer 35

Thoracolumbar, Craniosacral

Question 36

In the sympathetic outflow, somatic NS has ____ peripheral motor neuron axon whereas the ANS has ___ motor neuron axons

A) 1,2
B) 2,1,
C) 0,1
D) 1,0

Answer 36

A) 1,2

Question 37

What are the parasympathetic cranial nerves?

Answer 37

oculomotor, facial, glossopharyngeal, vagus