Spinal Anatomy Tracts (PNS) Flashcards Preview

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Flashcards in Spinal Anatomy Tracts (PNS) Deck (62)
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The Pns is myelinated by what types of cells

Schwann cells

1

In between the myelin there are nodes called what

Nodes of Ranvier

2

The PNS consists of what

CN and Spinal Nerves (including their ganglia)

3

PNS ganglia are groups of what

Of neuron cell bodies

4

Peripheral nerves or just ("Nerve") are mostly what type of axons

myelinated axons

5

what is a nerve fiber of the Pns

single axon is a peripheral nerve

6

where are unipolar cells found in the pns

posterior rood ganglion

7

where are bipolar cells found in the pns

in retina and sensory ganglion of cochlear and vestibular nerves

8

are spinal roods the same as dermatomes

the are similar but they are NOT the same

9

What are the cutaneous (superficial) branches of the cervical plexus and their nerve root(s)

Lesser Occipital (C2,3)
Greater Auricular (C2,3)
Transverse cervical (c2,3)
Supraclavicular (ant, mid and post) (C2,3)

10

What is the function of the Lesser occipital nerve

Sensory along the posterolateral neck

11

what is the function of the greater auricular nerve

sensory of the ear and parotid glad

12

what is the function of the transverse cervical nerve

sensory of the anterior and lateral neck

13

what is the function of the anterior, middle and cervical nerve

sensory of the shoulder and anterior chest

14

what are the motor (deep) branches of the cervical plexus and their roots

Ansa cervicalis (sup and inferior roots) (C1-4)
Segmental branches (C1-5)
phrenic (C3,4,5)

15

What is the function of the ansa cervicalis

Motor to the geniohyoid and infrahyoid muscles of the neck

16

what is the function of the segmental branches of the cervical plexus

motor to the neck and scalenes, levator, trapezium and SCM

17

what is the motor function of the phrenic nerve

C3, 4 and 5 keel the diaphragm alive

18

what are the nerves of the lumbar plexus

Femoral (L2-4)
Obturator (L2-4)
Lateral femoral cutaneous (Lat fem cut) (L2,3)
iliohypogastic (L1)
ilioinguinal (L1)
genitofemoral (L1-2)

19

what is the function of the femoral nerve

Sensory to thigh, leg, foot, hip, knee joints
Motor to anterior thigh, psoas, pectineus and iliacus

20

what is the function of the obturator nerve

sensory to medial thigh and hip joint
motor to adductors, gracilis and obturator externus

21

what is the function of the Lateral femoral cutaneous nerve of the lumbar plexus

Sensory to the lateral thigh, branches to the peritoneum

22

what is the function of the iliohypogastic nerve

Sensory to the lower abdomen, lower back and hip, anterolateral abdominal wall and pubic region

23

what is the function of the ilioinguinal nerve

sensory to the external genitalia thigh and abdominals

24

what is the function of the genitofemoral nerve

sensory to the the scrotum, labia, thigh and cremasterics

25

What are the branches of the sacral plexus and their roots

Sciatic nerve (L4,5 & S1-2)
Tibial (L4-S3)
Common Peroneal (Fibular) (L4-S2)
Superficial peroneal (fibular) (L4-S2)
Deep peroneal (L4-S2)
Superior Gluteal (L4, L5, S1)
Inferior Gluteal (L5-S2)
Pudendal (S2-S4)

26

what is the function of the sciatic nerve

motor to the Tibial and common peroneal nerve

27

What is the function of the tibial nerve

Sensory to the posterior leg and foot
motor to all muscles back of the thigh, leg and foot

28

what is the function of the common peroneal nerve

sensory to anterior leg and dorsum of foot
motor to peroneals, tibialis anterior, extension of toes

29

what is the function of the superficial peroneal nerve

motor to the lateral compartment of the leg