128 results
Convergence Retraction Nystagmus with a left 6th nerve palsy

Caused by a Midbrain hemorrhage

Dr. Boby Varkey Maramattom
Convergence Retraction ... Nystagmus with ... @bobvarkey #Convergence ... #retraction #nystagmus
Classic Findings During Hallpike Test in Posterior Canal Benign Paroxysmal Positional Vertigo (BPPV)
 • Latency (delay
Latency (delay in nystagmus ... and torsional nystagmus ... and nystagmus escalates ... 30 seconds • Nystagmus ... sitting position • Nystagmus
HINTS Exam - Bidirectional Nystagmus 

In a patient with vertigo symptoms, this finding is worrisome for
Bidirectional Nystagmus ... a patient with vertigo ... CENTRAL cause of vertigo ... Bidirectional #Nystagmus ... Neurology #Central #Vertigo
HINTS Exam - Unidirectional Nystagmus - Left-beating

In a patient with vertigo symptoms, this finding is reassuring
Unidirectional Nystagmus ... a patient with vertigo ... PERIPHERAL cause of vertigo ... Unidirectional #Nystagmus ... Neurology #Peripheral #Vertigo
The HINTS Exam - Differentiating Central vs Peripheral Vertigo

Head Impulse Test
Nystagmus
Test of Skew

Animation by Dr. Y.
vs Peripheral Vertigo ... Impulse Test Nystagmus ... PhysicalExam #Testing #Vertigo
Causes of Dizziness - Vertigo - Differential Diagnosis Algorithm
True Vertigo - Illusion of Rotary Movement
Peripheral Vestibular
of Dizziness - Vertigo ... Algorithm True Vertigo ... unidirectonal nystagmus ... Paroxysmal Positional Vertigo ... bidirectional nystagmus
Parinaud's Syndrome
What?
 - Impaired upgaze
 - Light-near dissociation
 - Convergence retraction nystagmus
 - Eyelid retraction (Collier's
dissociation - Convergence ... retraction nystagmus
Diagnostic Algorithm for Dizziness and Vertigo
Peripheral Vertigo:
 • Attacks: Sudden, severe, can last anywhere from seconds
Dizziness and Vertigo ... Peripheral Vertigo ... minutes to days • Nystagmus ... present Central Vertigo ... vascular causes • Nystagmus
Characteristics of Peripheral and Central Vertigo
PERIPHERAL VERTIGO
 • Onset: Sudden
 • Intensity: Severe initially, often decreasing
Peripheral and Central Vertigo ... PERIPHERAL VERTIGO ... vestibular neuritis • Nystagmus ... BPPV); worsens vertigo ... circulation TIA • Nystagmus
Parinaud's syndrome
What?
 • Light-near dissociation (tectal pupils)
 • Convergence retraction nystagmus
 • Eyelid retraction (Collier's sign)
tectal pupils) • Convergence ... retraction nystagmus