click below
click below
Normal Size Small Size show me how
Nerve Loss (muscles)
(CN) Nerve Root, Muscle Weakness, Reflexes
Front | Back |
---|---|
C5 (Muscle innervation, Reflexes) | Muscles: Supraspinatus, infraspinatus, delt, biceps. Reflexes: Biceps & Brachioradialis |
C6 (Muscle innervation, Reflexes) | Muscles: Biceps, Supinator, wrist extensors. Reflexes: Biceps, brachioradialis |
C7 (Muscle innervation, Reflexes) | Muscles: Triceps, wrist flexors Reflexes: Triceps |
C8 (Muscle innervation, Reflexes) | Muscles: Ulnar deviators, Thumb extensors, Thumb adductors. Reflexes: Triceps |
L1 (Muscle innervation, Myotome, Reflexes) | Muscles: None Myotome: L1,2 Hip flexion Reflexes: None |
L2 (Muscle innervation, Myotome, Reflexes) | Muscles: Psoas, hip adductors. Myotome: L1,2 Hip flexion Reflexes: None |
L3 (Muscle innervation, Myotome, Reflexes, Findings) | Muscles: Psoas, Quads. Myotome: L3,4 Knee extension Reflexes: Knee jerk sluggish Findings: PKB positive, pain on full SLR |
L4 (Muscle innervation, Myotome, Reflexes, Findings) | Muscles: Tib ant, EH Myotome: L3,4 Knee extension L4,5 Dorsiflexion (heel walking) Reflexes: Weak or absent knee jerk Findings: Limited SLR, Pain w/ neck flexion, limited side flexion |
L5 (Muscle innervation, Myotome, Reflexes, Findings) | Muscles: EH, Peroneals, Glut med, DFs, Hamstring and calf atrophy Myotome: L4,5 DF. L5 Great toe extension Reflexes: Achilles. Findings: SLR limited on one side, painful neck flexion, decreased ankle ROM, Crossed-leg raising pain |
S1 & S2 (Muscle innervation, Myotome, Reflexes, Findings) | Muscles: Calf and hamstring, Wasting of gluts, peroneals, PFs. Myotome: S1, PF (toe walking) S2, Great toe flexion Reflexes: Achilles reflex weak or absent. Findings: Limited SLR |
S2 | Same as S1 |
How do you test CN I? | Identify familiar odors. |
How do you test CN II? | Visual fields |
How do you test CN III? | Upward, downward & medial gaze. Reaction to light. |
How do you test CN IV? | Downward & lateral gaze |
How do you test CN V? | Corneal reflex, face sensation, separate clenched jaw, jaw jerk |
How do you test CN VI? | Lateral gaze |
How do you test CN VII? | Close eyes tight, smile and show teeth, whistle and puff cheeks, Identify sweet/sour |
How do you test CN VIII? | Hear watch ticking, hearing tests, balance & coordination |
How do you test CN IX? | Gag reflex, ability to swallow |
How do you test CN X? | Gag reflex, ability to swallow, say "ahhh" |
How do you test CN XI? | Resisted shoulder shrug |
How do you test CN XII? | Tongue protrusion (tongue deviates toward injured side) |
Posterior cord: | US subscapular, LS, TD, Axillary, Radial |
Medial cord | MP, Median, Ulnar |
Lateral cord | LP, MC |
Upper trank | SC Sublavis, SS suprascapular |
Roots | DS LT |