24 results
Lower Extremity Dermatomes and Myotomes
Reflexes: 
 • Knee - L2, L3, L4
 • Ankle - S1
Lower Extremity Dermatomes ... • Cauda Equina Syndrome ... Myotomes #diagnosis #neurology ... #sensory #motor ... #leg #physicalexam
Causes of Peripheral Weakness with Sensory Changes - Differential Diagnosis Algorithm
Radiculopathy:
 • Disc
 • Spondylosis
 •
Weakness with Sensory ... Changes - Differential ... Compression: • Carpal ... Peripheral #Weakness #Sensory ... #Neurology #Differential
Upper Extremity Dermatomes and Myotomes
Motor Function
Shoulder:
 • Abduction - C5,C6 (axillary)
 • Adduction - C6, C7,
Upper Extremity Dermatomes ... Carpal Tunnel Syndrome ... Myotomes #diagnosis #neurology ... #sensory #motor ... #arm #physicalexam
Causes of Hemiplegia - Differential Diagnosis Algorithm
Cerebral Hemisphere (Contralateral motor cortex)
 • Aphasia
 • Apraxia
 •
of Hemiplegia - Differential ... Brown-Sequard Syndrome ... (sensory loss to ... #Hemiplegia #Neurology ... #Differential #
Confabulation
What? Honest Lie.  
No incoming sensory information + Filling of the blanks with different information
No incoming sensory ... Diseases: Korsakoff Syndrome ... Disease, Anton's Syndrome ... Confabulation #differential ... diagnosis #causes #neurology
Cauda Equina Syndrome Overview

Cauda Equina Syndrome:
 • Prevalence: 1:33,000-100,000 ppl/yr
 • Incidence: 1.5-3.4 million ppl/yr
 •
and/or genital sensory ... constipation Differential ... region (S2-S4 dermatomes ... #differential # ... diagnosis #causes #neurology
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
Levels Spinal Root Sensory ... None T7-T12 See Dermatomes ... NerveRoots #Levels #differential ... #diagnosis #Neurology
Causes of Peripheral Weakness without Sensory Changes - Differential Diagnosis Algorithm
No Objective Weakness
 • Cardio-pulmonary disease
Weakness without Sensory ... Changes - Differential ... Lambert-Eaton Myasthenic Syndrome ... Peripheral #Weakness #Neurology ... #Differential #
Mechanisms of Pain
Mixed - Nociceptive/Neuropathic
Nociceptive - Tissue Damage
 - Visceral - (From organ/cavity lining) Poorly localized,
regional pain syndrome ... Deafferentation - Loss of sensory ... Pain #Mechanisms #Neurology ... #Differential #
Lesions of the Spinal cord - Spinal Cord Syndromes

Spinal cord lesions can result in permanent neurologic
result in permanent neurologic ... at the level of sensory ... paralysis - Sensory ... #lesions #differential ... #diagnosis #neurology