8 results
Upper Extremity Dermatomes and Myotomes
Motor Function
Shoulder:
 • Abduction - C5,C6 (axillary)
 • Adduction - C6, C7,
Upper Extremity ... ) Reflexes: ... Syndrome Wrist drop ... nerve in the radial ... #sensory #motor
Lower Extremity Dermatomes and Myotomes
Reflexes: 
 • Knee - L2, L3, L4
 • Ankle - S1
Reflexes: • ... Knee - L2, L3, ... Medical Emergency ... Neuropathy - Foot drop ... Commonly caused
Spinal Cord Injury by Nerve Root Levels
Spinal Root	Sensory	Motor	Reflex
C4	Acromioclavicular Joint	Respiration	None
C5	Radial Antecubital Fossa	Elbow Flexion	Biceps Reflex
C6	Dorsal Thumb	Wrist Extension	Brachioradialis Reflex
C7	Dorsal
Cord Injury by Nerve ... Levels Spinal Root Sensory ... None T7-T12 See Dermatomes ... Condyle Knee Extension ... Ankle Dorsiflexion Knee
Left Wrist Drop - Radial Nerve Palsy on Physical Examination

Left hand drop due to compression of
- Radial Nerve Palsy ... #Radial #Nerve ... PhysicalExam #clinical #video ... #orthopedics #msk ... #sports #neurology
Cauda Equina Syndrome Overview

Cauda Equina Syndrome:
 • Prevalence: 1:33,000-100,000 ppl/yr
 • Incidence: 1.5-3.4 million ppl/yr
 •
compression of nerve ... and/or genital sensory ... - Emergency Causes ... region (S2-S4 dermatomes ... #neurology
Hoffman's sign. Even in this specific case, accompanied by a clonus outline (rhythmic contractions). The median
this specific case ... The median nerve ... middle finger. 2) Ask ... Hoffmanns #Sign #Reflex ... Abnormal #clinical #video
Oppositional Grasp Weakness in Carpal Tunnel Syndrome

Dysfunction of the six- Opposition weakness-in carpal tunnel syndrome with
weakness of the median ... nerve & Ulnar nerve ... In this case, the ... Syndrome #clinical #video ... #orthopedics #msk
Posterior Knee Dislocation Injury
Specifically, POSTERIOR KNEE DISLOCATIONS can have significant associated injury that needs unique approach
DISLOCATION: ~25% cases ... Common peroneal nerve ... trauma/vascular/orthopedic ... Posterior #Injury #msk ... #clinical #video