16 results
Lower Extremity Dermatomes and Myotomes
Reflexes: 
 • Knee - L2, L3, L4
 • Ankle - S1
Lower Extremity ... • Cauda Equina Syndrome ... - Low back pain ... Neuropathy - Foot drop ... #leg #physicalexam
Causes of Hemiplegia - Differential Diagnosis Algorithm
Cerebral Hemisphere (Contralateral motor cortex)
 • Aphasia
 • Apraxia
 •
• Decreased Level ... Consciousness • Cranial Nerve ... Brown-Sequard Syndrome ... pain and temperature ... #Hemiplegia #Neurology
Leg Pain - Differential Diagnosis Framework

Bone/Joint Causes of Leg Pain:
 • Fracture
 • Arthritis
 • Gout/pseudogout
Leg Pain - Differential ... Sciatica • Tarsal tunnel ... diagnosis #lower ... #extremity #msk ... #physicalexam
Guillain–Barré syndrome (GBS)
(aka: Landry–Guillain–Barré–Strohl syndrome:
	Most common cause of acute flaccid paralysis
	Rapidly progressive ascending paralysis & areflexia
	Autonomic
Guillain–Barré syndrome ... moves rapidly from lower ... Differential diagnosis ... prominent cranial nerve ... Transverse myelitis: Pain
Meralgia paresthetica: Pathogenesis and Clinical Findings
Compression/injury of Lateral Femoral Cutaneous Nerve (LFCN) -> Meralgia paresthetica
 •
Femoral Cutaneous Nerve ... must be absent: lower ... Straight Leg Raise Test ... MeralgiaParesthetica #MSK ... pathophysiology #differential
Acute Spinal Cord Injuries: Pathogenesis and clinical findings
 • Anterior Cord Syndrome -> Anterior spinal artery
Loss of pain and ... Sensory loss below ... Mixed upper and lower ... signs #symptoms #msk ... #orthopedics #neurology
Upper Extremity Dermatomes and Myotomes
Motor Function
Shoulder:
 • Abduction - C5,C6 (axillary)
 • Adduction - C6, C7,
Wrist drop - Occurs ... Carpal Tunnel Syndrome ... Myotomes #diagnosis #neurology ... #sensory #motor ... #arm #physicalexam
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 ... • Provocative Tests ... #differential # ... diagnosis #causes #neurology
Lesions of the Spinal cord - Spinal Cord Syndromes

Spinal cord lesions can result in permanent neurologic
result in permanent neurologic ... Weakness - Lower ... of sensory loss ... paralysis - Sensory ... #lesions #differential
Spinal Cord Disorders - Differential Diagnosis Framework

Spinal cord neurological lesion:
Clinical findings:
 • Symptoms and signs below
Cord Disorders - Differential ... reported at level ... MCTD, Sjogren syndrome ... loss: Sensory level ... disorders #diagnosis #neurology