nerve roots 1/1 Flashcards

1
Q

C1

A

dermatome: vertex of skull
myotome: (cervical rotation)
reflexes: n/a
paresthesias: n/a

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2
Q

C2

A

dermatome: forehead, temple, occiput
myotome: longus colli, SCM, rectus capitis (shoulder elevation)
reflexes: n/a
paresthesias: n/a

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3
Q

C3

A

dermatome: neck, posterior cheek, temporal area, under mandible
myotome: trap, splenius capitis (shoulder elevation)
reflexes: n/a
paresthesias: cheek, side of neck

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4
Q

C4

A

dermatome: shoulder area, clavicular area, upper scapula area, AC joint
myotome: trapezius, levator scapulae (shoulder elevation)
reflexes: n/a
paresthesias: horizontal band along clavicle and upper scapula

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5
Q

C5

A

dermatome: deltoid area, anterior entire arm to base of thumb
myotome: biceps, supraspinatus, infraspinatus, deltoid (shoulder abduction, elbow flexion)
reflexes: biceps, brachioradialis
paresthesias: n/a

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6
Q

C6

A

dermatome: anterior arm, radial side hand to thumb and index finger
myotome: biceps, supinator, wrist extensors (elbow flexion, wrist extension)
reflexes: biceps, brachioradialis
paresthesias: thumb, index finger

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7
Q

C7

A

dermatome: lateral arm and forearm to index/long/ring fingers
myotome: triceps, wrist flexors (rarely wrist extensors) (elbow extension, wrist flexion)
reflexes: triceps
paresthesias: index, long, ring fingers

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8
Q

C8

A

dermatome: medial arm and forearm to long, ring, and little finger
myotome: ulnar deviators, thumb extensors, thumb adductor, (rarely triceps) (thumb extension)
reflexes: n/a
paresthesias: little finger alone or with adjacent fingers

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9
Q

T1

A

dermatome: medial side forearm to base of little finger
myotome: n/a (finger adduction)
reflexes: n/a
paresthesias: n/a

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10
Q

T2

A

dermatome: medial side upper arm to medial elbow, pectoral and midscapular areas
myotome: n/a
reflexes: n/a
paresthesias: n/a

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11
Q

T3-T12

A
dermatome: 
T3-T6 upper thorax
T5-T7 costal margin
T8-T12 abdomen and lumbar region
myotome: n/a
reflexes: n/a
paresthesias: n/a
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12
Q

L1

A

dermatome: back, over trochanter and groin
myotome: n/a (hip flexion)
reflexes: n/a
paresthesias: groin after holding posture which causes pain

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13
Q

L2

A

dermatome: back, front of thigh to knee
myotome: psoas, hip adductors (hip flexion)
reflexes: n/a
paresthesias: occasional anterior thigh

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14
Q

L3

A

dermatome: medial femoral condyle, back, upper buttock, anterior thigh, anterior knee, medial lower leg
myotome: psoas, quads, thigh atrophy (knee extension)
reflexes: knee jerk sluggish
prone knee bend +
pain on full SLR
paresthesias: medial knee, anterior lower leg

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15
Q

prone knee bend test

A

purpose: neural tension test stressing the femoral nerve and the mid lumbar (L2-L4) nerve roots
procedure: passively flex patient’s knee to end range and hold for 45 seconds, stabilize hip to avoid rotation
+: Pain in
anterior thigh may be tight/strained quadriceps muscle or neural tension of the femoral nerve.
unilateral lumbar area, buttock, or posterior thigh may be lumbar radiculopathy of L2-L3 nerve roots.

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16
Q

L4

A

dermatome: medial malleolus, medial buttock, lateral thigh, medial leg, dorsum of foot, big toe
myotome: tibialis anterior, extensor hallucis (ankle DF) (knee extension, ankle DF)
reflexes: SLR limited
neck flexion pain
weak or absent knee jerk
side flexion limited
paresthesias: medial aspect of ankle

17
Q

L5

A

dermatome: 3rd MTP joint, buttock, posterior and lateral thigh, lateral aspect leg, dorsum foot, medial half of sole, 1-3rd toes
myotome: extensor hallucis, peroneals, gluteus medius, dorsiflexors, hamstrings and calf atrophy (ankle DF, great toe extension)
reflexes: SLR limited one side
neck flexion painful
ankle decreased
cross leg raising pain
paresthesias: lateral aspect of leg, medial 3 toes

18
Q

S1

A

dermatome: lateral and plantar foot
myotome: calf and hamstrings, wasting of gluteals, peroneals, plantar flexors (ankle PF)
reflexes: SLR limited
achilles reflex weak or absent
paresthesias: lateral 2 toes, lateral foot, lateral leg to knee, plantar aspect of foot

19
Q

S2

A

dermatome: popliteal fossa, buttock, thigh, posterior leg
myotome: calf and hamstrings, wasting of gluteals, plantar flexors
reflexes: SLR limited
achilles reflex weak or absent
paresthesias: lateral leg, knee, heel

20
Q

S3

A

dermatome: ischial tuberosity, groin, posteromedial thigh to knee
myotome: n/a
reflexes: n/a
paresthesias: n/a

21
Q

S4

A

dermatome: perineum, genitals, lower sacrum
myotome: bladder, rectum
reflexes: n/a
paresthesias: saddle area, genitals, anus, impotence, massive posterior herniation

22
Q

What dermatome is associated with the plantar surface of the foot?

A

S1

23
Q

Which dermatome would be tested by assessing the area of the middle third of the anterior thigh??

A

L3

24
Q

Which dermatome would be assessed by touching dorsal surface of the great toe?

A

L5