chapter 17 Flashcards
The term ___________ refers to a network braiding or twining where its parts combine, divide, and may combine again.
Plexus
What in the body creates the arrangement of a plexus?
-this arise from spinal nerves that segmentally come off the spinal cord
Ventral rami
The nerves arising form the _______________ often contain neurons that originate from more than one ventral ramus
plexus
Peripheral nerve plexuses include the:
1) CERVICAL PLEXUS
2) Brachial plexus
3) Lumbar plexus
4) Sacral plexus
5) Coccygeal plexus
The cervical plexus arises from the?
ventral rami C1,C2,C3, and C4
What does the cervical plexus supply?
It supplies the head, neck, and shoulders
What is the most important branch of the cervical plexus?
Phrenic Nerve
The PHRENIC nerve arises from the…
Ventral rami of C3, C4, and C5
What does the phrenic nerve supply?
DIAPHRAGM
The brachial plexus arises from the?
ventral rami of C5, C6, C7, C8, and T!
What does the brachial plexus supply?
upper limb
The lumbar plexus arises from the?
Ventral rami of L1, L2, L3, and the UPPER DIVISION of the ventral ramus of L4
What structure does the lumbar supply?
lateral, anterior, and medial sides, of the thigh
The ______________ arises from the LOWER DIVISION of the ventral ramus of L4, and the ventral rami L5 and S1 thorugh S4
Sacral plexus
The sacral plexus primarily supplies the rest of the?
Lower limb
The _______________ arises from the ventral ramus of Cx1
coccygeal plexus
The coccygeal plexus supplies the small area over the
Coccyx
1) Which of the following is INCORRECT?
a. The brachial plexus supplies the upper limbs
b. The brachial plexus arises from the ventral rami of C5, C6, C7, C8, and T1
c. The cervical plexus arises form the ventral rami of C1, C2, C3, and C4
d. The phrenic nerve arises from the dorsal rami of C3, C4, and C5
d) the phrenic nerve arises from the dorsal rami of C3,C4, and C5
2) Which of the following is CORRECT?
a. The coccygeal plexus arises from the ventral rami of Cx2
b. The lumbar plexus supplies structures of the lateral, anterior, and medial sides of the thigh
c. The sacral plexus arises from the upper division of the ventral ramus of L4, and the ventral rami of L5 and S1, S2,S3, and S4
d. The lumbar plexus arises from the dorsal rami of L1, L2,L3, and the upper division of dorsal ramus of L4
b) the lumbar plexus supplies structures of the lateral, anterior, and medial sides of the thigh
