13 results
Myotomes of the Spinal Cord
Each segmental nerve root innervates more than one muscle. For simplicity, certain
equina). ... The cauda equina ... more resilient to injury ... Myotomes #SpinalCord #Diagnosis ... #Neurology #Localization
Cauda Equina Syndrome Overview

Cauda Equina Syndrome:
 • Prevalence: 1:33,000-100,000 ppl/yr
 • Incidence: 1.5-3.4 million ppl/yr
 •
Cauda Equina Syndrome ... Equina Syndrome ... equina syndrome ... Equina Syndrome ... #Equina #syndrome
Lesions of the Spinal cord - Spinal Cord Syndromes

Spinal cord lesions can result in permanent neurologic
- Spinal Cord Syndromes ... involvement Cauda ... Equina Syndrome ... #differential #diagnosis ... #neurology
Causes of Neuromuscular Weakness
 • Spinal Cord: Demyelinating Disease (MS), Epidural abscess, Infarction, Syringomyelia, Tetanus, Transverse
Weakness • Spinal Cord ... Demyelinating Disease (MS ... injury, Sarcoid ... #differential #diagnosis ... #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
Spinal Cord Injury ... by Nerve Root Levels ... C6 Dorsal Thumb Wrist ... Anterior Medial Thigh Hip ... #Neurology #Spine
Spinal Cord Disorders - Differential Diagnosis Framework

Spinal cord neurological lesion:
Clinical findings:
 • Symptoms and signs below
- Differential Diagnosis ... Lower roots -> Cauda ... equina- decreased ... MCTD, Sjogren syndrome ... #neurology #differential
Upper Extremity Dermatomes and Myotomes
Motor Function
Shoulder:
 • Abduction - C5,C6 (axillary)
 • Adduction - C6, C7,
Pronation - C7, C8 Wrist ... Wrist drop - Occurs ... spared in this injury ... Dermatomes #Myotomes #diagnosis ... #neurology #sensory
Guillain-Barre Syndrome - Summary

Acute AIDP that presents with rapidly progressive flaccid weakness

Epidemiology:
 • 1-2 cases/100,000 per
Guillain-Barre Diagnosis ... roots and cauda ... equina • GQ1b ... #diagnosis #management ... #treatment #neurology
Guillain-Barré Syndrome (GBS)
Acute autoimmune demyelinating polyradiculoneuropathy that presents with rapidly progressive flaccid weakness
Epidemiology:
 • Incidence: 1
Guillain-Barré Syndrome ... and sensitive tests ... roots and cauda ... equina TREATMENT ... #neurology
Transverse Myelitis Overview

Focal inflammatory disorder of the spinal cord resulting in rapid onset of weakness, sensory
Presentation: Injury ... bouts of HTN Diagnostic ... negative, MOG-IgG test ... brain and/or optic nerve ... #management #neurology