Nervous supply

Question 1

Which roots of the spinal cord are “sensory” ?

Answer 1

Ascending tracts

Question 2

Which roots of the spinal cord are “motor”?

Answer 2

Descending tracts

Question 3

2 major functions of the Spinal nerves

Answer 3

1. A pathway for sensory and motor impulses
2. Responsible for reflexes—our quickest reactions to stimuli

Question 4

The posterior/Dorsal root is
______________ in nature

Answer 4

“sensory” in nature

Question 5

Anterior/Ventral root is _________ in nature?

Answer 5

“motor” in nature

Question 6

Why are the spinal nerves considered as “mixed” nerves

Answer 6

The combination of both sensory and motor fibers within a single spinal nerve makes it a mixed nerve,

Question 7

A mixed nerve is called

Answer 7

Spinal nerve trunk.

Question 8

Each large branch is named a ____1_____ and can be _____2______ and ______3________

Answer 8

1. Ramus
2. Anterior &
3. Posterior ramus).

Question 9

Name of the brachial plexus, its location in the spinal cord

Answer 9

5 Brachial plexus
1. Axillary Nerve
2. Median Nerve
3. Musculocutaneous Nerve
4. Radial Nerve
5. Ulnar Nerve

Location in the spinal cord is:
the neck region,
specifically the 5th to 8th cervical nerves and 1st thoraic nerve.
(C5-C8) - (T1)

Question 10

_____________ are networks of nerves that supply the upper limbs.

Answer 10

Brachial plexuses

Question 11

Axons from the _____1_____ of spinal nerves form a network on both the left & right of the body by joining various numbers of axons. This network of axons is _______2_______

Answer 11

1. Anterior rami
2. The spinal plexus.

Question 12

Each plexus is formed by ____________ of spinal nerves C5–T1

Answer 12

the anterior rami

Question 13

Each brachial plexus innervates ______________ and the ____________

Answer 13

1. the pectoral girdle
2. the entire upper limb of one side

Question 14

Axillary Nerve Innervates muscles in the _______

Answer 14

Deltoid, Teres minor muscles and superiolateral arm

Question 15

Median Nerve Innervates muscles in the ________

Answer 15

Most anterior forearm muscles, thenar (thumb) muscles and lumbricals. Palmar aspects and dorsal tips of lateral 3-1/2 digits

Question 16

Musculocutaneous Nerve innervates muscles in the _________

Answer 16

“Anterior arm muscles including the biceps brachii, brachialis, and coracobrachialis, and the lateral region of the forearm.

Question 17

Radial Nerve innervates muscles in the

Answer 17

Posterior arm and forearm muscles, including the triceps brachii, anconeus, and the muscles responsible for wrist and finger extension.

Question 18

Ulnar Nerve innervates muscles in the ____________

Answer 18

Anterior forearm muscles, intrinsic hand & dorsal and palmar aspects of medial 1-1/2 digits (little finger, medial aspect of ring finger)