Lab Spinal Plexuses

Question 0

Brachial plexus

Answer 0

•C5-T1
-nerves: musculocutaneous, axillary, median, radial, ulnar
•muscles of the skin, forearm, shoulder, hand

Question 1

Cervical plexus

Answer 1

• C1-4
• phrenic nerve: diaphragm
• no never, but supplies skin of head neck and shoulder

Question 2

The lumbosacral plexus consists of

Answer 2

•the lumbar plexus L1-4
And
•the sacral plexus L4-S4

Question 3

Lumbar plexus

Answer 3

•L1-4
-nerves and body area:
•femoral: skin and muscles of hip and thigh
•obturator: muscles and skin of the medial thigh

Question 4

Sacral plexus

Answer 4

•S1-4
•Sciatic nerve:
-tibial: posterior thigh, leg muscles and skin
-common peroneal: anterior lateral leg and foot, skin and muscles

Question 5

Coccygeal plexus

Answer 5

• S5-C0

* coccygeal nerve: perineum of coccyx skin and muscles

Question 6

There is no thoracic plexus, instead

Answer 6

•it acts as the muscles and skin between the ribs

Question 7

Autonomic motor neurons include

Answer 7

•sympathetic
•parasympathetic
*control actions of the internal organs

Question 8

Auto: sympathetic

Answer 8

• communicating rami
• superior and inferior cervical ganglia
• chain ganglia
• organ plexuses(heart, esophagus, stomach)

Question 9

Auto: parasympathetic

Answer 9

• vagus nerve

* organ plexuses

Question 10

Parasympathetic pathway

Answer 10

• originates in the cranial nerves (3,7,9,10) (sacral region)
• cell bodies of preganglionic neurons in brain stem, involved in activation if digestion, dedication urination etc
• vagus nerve