Upper Extremity Myotomes
What does a myotome score of 5/5 mean?
Normal - completion of full ROM against gravity, maintain position against MAX resistance
How many upper extremity dermatomes are there?
There are 6 dermatomes. (C4, C5, C6, C7, C8, T1)
How many reflexes are in the upper extremity?
3 Reflexes. Biceps, Brachioradialis, and Triceps.
How many lower extremity dermatomes are there?
7 dermatomes. (L2, L3, L4, L5/S1, L5, S1, S2)
What is a myotome?
A group of muscles innervated by a single spinal nerve.
What does a myotome testing score of 2/5 mean?
Poor - Completion of full ROM in gravity eliminated position
What is a dermatome?
Area of skin that is innervated by a specific peripheral nerve.
What spinal cord levels are responsible for the patellar reflex?
L3 and L4
What is the medial malleolus dermatome spinal cord level?
L4 Dermatome
How many heel raises does a client need to perform to score a 4/5 when testing plantar flexion?
10 Heel Raises
What is the motor action of the C7 myotome?
Elbow Extension
What is the dermatome for the C8 spinal cord level?
Palmer surface of the fifth digit.
What does a reflex score of 3+ mean?
The reflex is brisker than average
What is the dermatome for the L5 spinal cord level?
Web-space between 1st and 2nd MTP
What is the motor action of the L2 myotome?
Hip Flexion
What is the motor action of the T1 myotome?
Finger Abduction
What nerve corresponds to with the C7 dermatome?
Median Nerve
What reflex is mediate by spinal cord level C6?
Brachioradialis Reflex. Test the muscle belly.
What nerve corresponds with the L3 dermatome?
Femoral Nerve
What is the motor action of the L3 myotome?
Knee Extension
What is the spinal cord level for the shoulder shrug myotome?
C4 Myotome
What dermatome and spinal cord level corresponds to the radial nerve?
Dorsal Thumb and C6
What reflex score may indicate clonus?
A reflex score of 4+ (very brisk)
What dermatome and spinal cord level corresponds to the sural nerve?
Lateral Heel and S1
What is the spinal cord level for 1st MTP extension myotome?
L5 Myotome