Spinal Nerve Roots (Lecture #15) Flashcards
where can the dorsal root ganglion be found? (landmark)
intervertebral foramen
dorsal root
first order sensory axons entering the spinal cord from a specific dermatome
ventral root
LMN axons leaving the spinal cord to go to that spinal cord level’s myotome
“nerve root” usually referes to
mixed spinal nerve
dermatome of back of head
C2
dermatome of nipples
T4
dermatome of umbilicus
T10
dermatome of “saddle area”
S3,4,5
dermatome of thumb
C6
dermatome of middle finger
C7
dermatome of little finger
C8
dermatome of medial calf
L4
dermatome of lateral calf and big toe
L5
dermatome of little toe and sole of foot
S1
what space is the cauda equina found in
subarachnoid space
radiculopathy
sensory or motor dysfunction caused by injury to a nerve cell
muscle associated with C5 nerve root
deltoid (C5,6)
reflex associated with C5 nerve root
biceps (C5,6)
brachioradialis (C5,6)
dermatome associated with C5 nerve root
lateral upper arm over deltoid
muscle associated with C6 nerve root
biceps (C5,6) wrist extensors (C5,6,7,8)
reflex associated with C6 nerve root
biceps (C5,6)
brachioradialis (C5,6)
dermatome associated with C6 nerve root
thumb/lateral arm
muscle associated with C7 nerve root
triceps (C6,7,8)
reflex associated with C7 nerve root
triceps (C6,7,8)
dermatome associated with C7 nerve root
middle finger and middle of hand
muscle associated with L4 nerve root
quads (L2,3,4)
reflex associated with L4 nerve root
patellar (L4)
dermatome associated with L4 nerve root
medial leg below knee
muscle associated with L5 nerve root
tibialis anterior (L4,5)
reflex associated with L5 nerve root
none
dermatome associated with L5 nerve root
lateral leg below the knee; usually includes big toe
muscle associated with S1 nerve root
gastroc/soleus (S1,2)
reflex associated with S1 nerve root
achilles (S1)
dermatome associated with S1 nerve root
lateral aspect of foot, little toe, sole of foot
what nerve roots are affected in cauda equina syndrome
L2 and below
what spinal level can you find conus medularis
L1