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PCOM Ortho Neuro1
Dermatomes, Myotomes, Tests and Reflexes for C1 through L4
| Question | Answer |
|---|---|
| C5 muscle innervation | Deltoid (pure C5: axillary nerve), biceps (C5 and C6), shoulder abduction (middle portion of deltoid and the supraspinatous: suprascapular nerve) |
| C5 myotome (muscle) testing | chicken wing (for deltoid). biceps (try to pull her flexed arm down while she resists) for biceps |
| C5 dermatome (skin) testing | Lateral aspect of the deltoid is most pure area. |
| C5 reflex testing | Biceps tendon |
| C6 muscle innervation | Extensor carpi radialis C6 and ulnaris. (And radial nerve?) |
| C7 muscle innervation | Triceps, wrist flexors and finger extensors |
| C8 muscle innervation | Flexor digitorum superficialis, profundis, lumbricals |
| C6 myotome (muscle) testing-1 | same bicep as C5. but also... wrist extension. (remember the 6 shooter) |
| C7 myotome (muscle) testing-1 | tricep (you can do either of the 2 tests) |
| C8 myotome (muscle) testing-1 | Finger flexors |
| C6 dermatome (skin) testing | Lateral forearm, the thumb, the index finger |
| C7 dermatome (skin) testing | Middle finger |
| C8 dermatome (skin) testing | Distal medial half of forearm (anatomic position) and digits four and five five. |
| C6 reflex testing | Brachioradialis reflex |
| C7 reflex testing | Triceps tendon (SJ10) |
| C8 reflex testing | None |
| C6 mnemonic/pose | Six shooter, then recoil |
| C7 mnemonic/pose | Left arm akimbo. Right arm 'Oh no you don't' |
| C8 mnemonic/pose | Figure eight with fingers curved inside each others' palms |
| L1,2,3 mnemonic/pose | L1,2,3 to the knee |
| L2,3,4, mnemonic/pose | L2,3,4 kick big toe @ the door |
| L4 mnemonic/pose | L4 TO THE FLOOR, medially (BIG TOE) |
| L5 mnemonic/pose | LATERAL SIDE (ALL 3 MIDDLE TOES) |
| S1 mnemonic/pose | To the sun (tippy toes)-- and EVERSION (PINKY TOE) and back of calf (UB56) |
| S1 | (think Dad): tippy toe walk. back of gastroc, PINKY Toe. Reflex= "Achilles' 1 weakness" |
| L4 | (think of making L shape and then 4 shape with your foot): heel walk & foot INVERSION (think of making Figure 4 with you foot). Dermatome is medial leg, arch, Big Toe |
| T1 | think $1 T-bill. dollar bill and finger exercise. Dermatome is HEART channel. Think "I HEART T-BILLS" |
| C8 | remember choir boy pose (wedding and feyness)-- so finger curl thing. soft part of Yin forearm PLUS RING RINGER & PINKY FINGER. no reflex |
| C7 | flipping off someone? hold wrist flexed in and try to pull it up. PLUS that silly finger extension thing. Dermatome= middle finger only?? reflex= SJ10 |
| C6 | six shooter. so... bicep thing and wrist (extension) thing. Dermatome= lateral forearm PLUS 1st and 2nd fingers. Reflex= brachioradialis |
| C5 | chicken wing & bicep. dermatome= shoulder and forearm. reflex_ BICEP TENDON |
| L1,2,3 | myotome= iliopsoas? four times inner (start high!) thigh. NO REFLEX |
| L2,3,4 | myotome= leg extension! myotome= 2 medial upper leg, 2 medial calf, ARCH, Big Toe. Reflex= patellar |
| L5 | PILATES (Reflex= biceps femoris) plus Toes Resist Being Pushed Down plus Big Toe pushes up again hand! Dermatome= lateral calf, dorsum of foot, ALL THREE middle toes. |