6 results
Upper Extremity Dermatomes and Myotomes
Motor Function
Shoulder:
 • Abduction - C5,C6 (axillary)
 • Adduction - C6, C7,
aracteristic "claw hand ... regimental badge" anesthesia ... Myotomes #diagnosis #neurology ... #sensory #motor ... #arm #physicalexam
Ulnar Nerve Anatomy and Function
The Ulnar nerve is the nerve of hand power and control. It
Ulnar Nerve Anatomy ... Ulnar nerve is ... the nerve of hand ... Here the sensory ... #diagnosis #neurology
Lower Extremity Dermatomes and Myotomes
Reflexes: 
 • Knee - L2, L3, L4
 • Ankle - S1
Lower Extremity Dermatomes ... saddle (perineal) anesthesia ... damage to peroneal nerve ... Myotomes #diagnosis #neurology ... #sensory #motor
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 ... Flexion None T1 Ulnar ... None T7-T12 See Dermatomes ... differential #diagnosis #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 ... /or genital sensory ... sensory disturbances ... region (S2-S4 dermatomes ... diagnosis #causes #neurology
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
vasculitis • Sensory ... loss, arthralgia, arm ... bruits, asymmetric arm ... affects the skin, neurologic ... muscle weakness • Nerves