spinal nerves

26 cards

spinal nerves


 
  
Created Aug 2, 2009
by
emlancas

 

 
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1
what system are the spinal nerves a part of, and how many pairs?
 
PNS and 31 pairs containing both sensory and motor neurons
2
dorsal root contains what kind of neurons?
 
sensory
3
ventral root contains what kind of neurons?
 
motor neurons which are both voluntary and involuntary
4
what exists when the ventral and dorsal roots come together?
 
a spinal nerve which is about 1" long
5
what is the dorsal root ganglion?
 
it contains the cell bodies of sensory neurons
6
what does the spinal nerve divide into?
 
the dorsal ramus and the ventral ramus
7
describe the dorsal ramus
 
short and goes posteriorly
8
describe the ventral ramus
 
long, goes laterally, anteriorly and extends out into extremeties 
9
what is a nerve plexus?
 
a network of nerves formed by ventral rami only (none are made in the thoracic area---ribs...
10
what are the nerve plexi
 
cervical, brachial, lumbar, sacral
11
what are the cervical plexus?
 
the phrenic nerve...to the diaphragm
12
how many nerves in the brachial plexus?
 
5, axillary, radial, musculocutaneous, ulnar, median
13
what does the axillary nerve affect?
 
the shoulder muscle (deltoid and teres minor)
14
what doe the radial nerve affect?
 
posterior upper extremity, extensors
15
what does the musculocutaneous nerve affect?
 
the anterior arm, flexors and elbow
16
what does the ulnar nerve affect 
 
medial aspect of the anterior forearm and medial hand *4th and 5th fingers
17
what does the median nerve affect?
 
the lateral aspect of the anterior forearm  and lateral hand (1,2, and 3 fingers) also, flexors...
18
what nerves are a part of the lumbar plexus?
 
the femoral and the obturatoe
19
what does the femoral nerve do?
 
goes to anterior thigh (quadriceps and leg extension)
20
what does the obturator do?
 
goes to medial thigh (adduction)
21
what does the sacral plexus contain?
 
many small nerves that go to the lower back, posterior pelvis (gluteals) and perineum as well...
22
what does the sciatic nerve do?
 
goes to posterior thigh muscles (ham strings, leg flexion and hip extension)
23
the sciatic nerve divides into the...
 
tibial nerve and the common fibular nerve
24
what does the tibial nerve do?
 
posterior leg (plantar flexors) and sole
25
what does the common fibular nerve do?
 
goes to the anterior and lateral leg (primarily dorsiflexors and foot)
26
which nerve would be damaged if you were unable to extend your leg
 
femoral


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