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26 Cards in this Set
- Front
- Back
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Define Dermatomes |
Designated sensory areas based upon spinal segment innervation. |
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Nerve Root C1:
Dermatome Myotome
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Dermatome - Vertex of skull
Myotome - NONE |
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Nerve Root C2:
Dermatome Myotome |
Dermatome - Temple, forehead, occiput
Myotome - Longus colli, sternocleidomastoid, rectus capitus |
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Nerve Root C3:
Dermatome Myotome |
Dermatome - Entire neck, posterior cheek, temporal area, prolongation forward under mandible
Myotome - Trapezius, splenius, capitis |
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Nerve Root C4:
Dermatome Myotome |
Dermatome - shoulder area, clavicular area, upper scapular area
Myotome : Trapezius, levator scapulae |
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Nerve Root C5:
Dermatome Myotome Reflexes Affected |
Dermatome - deltoid area, anterior aspect of base of entire arm to base of thumb.
Myotome - Supraspinatus, infraspinatus, deltoid, biceps.
Reflexes Affected - biceps, bracioradialis |
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Nerve Root C6:
Dermatome Myotome Reflexes Affected |
Dermatome - anterior arm, radial side of hand to thumb and index finger.
Myotome - biceps, supinator, wrist extensors
Reflexes Affected - biceps, brachioradialis |
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Nerve Root C7:
Dermatome Myotome Reflexes Affected |
Dermatome - Lateral arm and forearm to inde3x, long, and ring fingers
Myotome - triceps, wrist flexors
Reflexes Affected: Triceps |
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Nerve Root C8:
Dermatome Myotome
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Dermatome - medial arm and forearm to long, ring, and little fingers
Myotome - ulnar deviators, thumb extensors, thumb adductors |
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Nerve Root T1:
Dermatome
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Medial side of forearm to base of little finger. |
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Nerve Root T2:
Dermatome |
Medial side of upper arm to medial elbow, pectoral and midscapular regions. |
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Nerve Roots T3-T12:
Dermatomes |
T3-T6 - upper thorax T5-T7 - costal margin T8-T12 - abdomen and lumbar region |
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Nerve Root L1:
Dermatome |
Back, over trochanter, and groin |
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Nerve Root L2:
Dermatome Myotome
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Dermatome - Back, front of thigh to knee
Myotome - psoas, hip adductors |
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Nerve Root L3:
Dermatome Myotome Reflexes Affected |
Dermatome - back, upper buttock, anterior thigh and knee, medial lower leg
Myotome - psoas, quadriceps
Reflexes Affected - knee jerk sluggish, pain on full SLR, pain w/ prone knee bending
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Nerve Root L4:
Dermatome Myotome Reflexes Affected |
Dermatome - Medial buttock, lateral thigh, medial leg, dorsum of foot, big toe
Myotome - Tibialis anterior, extensor hallicus
Reflexes Affected - weak or absent knee jerk |
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Nerve Root L5:
Dermatome Myotome
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Dermatome - buttock, posterior and lateral thigh, lateral aspect of leg, dorsum of foot, medial half of sole, first, second, and third toes
Myotome - extensor hallucis, peroneals, gluteus medius, dorsiflexors, hamstrings |
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Nerve Root S1:
Dermatome Myotome Reflexes Affected |
Dermatome - Lateral and plantar aspect of foot
Myotome - calf and hamstrings, glutealsw, peroneals, plantar flexors
Reflexes Affected - Achilles weak or absent |
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Nerve Root S2:
Dermatome Myotome
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Dermatome - Buttock, thigh, and posterior leg
Myotome - Achilles weak or absent |
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Nerve Root S3:
Dermatome
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Dermatome - groin, medial thigh to knee |
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Nerve Root S4:
Dermatome Myotome |
Dermatome - perineum, genitals, lower sacrum
Myotome - bladder, rectum |
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Describe sharp/dull sensory testing. |
Use Wartenberg pinwheels, alternate between dull and sharp and have the pt decide whether the sensation is then same or different. Compare sides of the body, proximal and distal, to identify patterns or innervation level of impairment. |
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Describe two-point discrimination. |
Using a two-point caliper on the skin, identify one or two points w/o visual input. |
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Describe localization of touch. |
The ability to identify the exact location of light touch on the body using a verbal response or gesturing. |
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Common diagnoses that result in dermatomal damage. |
CNS deficit, plexus or peripheral nerve damage. |
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demonstrate the dermatomes
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