Lacunar Syndromes Flashcards
Location of Pure Motor Hemiparesis
Posterior Limb of the Internal Capsule or Pons
Location of Pure Sensory
Ventral Thalamus
Location of Ataxic Hemiparesis
Ventral Pons or Internal Capsule and Pons
Location of Sensorimotor Stroke
Posterolateral thalamus
Posterior limb of the internal capsule
Location of the Dysarthria Clumsy Hand Syndrome
Ventral Pons or Genu of the Internal Capsule
Definition of a lacune
Small subcortical infarcts
Where are most lacunes found?
Most in the basal ganglia (putamen, globus pallidus, thalamus and caudate)
Subcortical white matter (internal capsule and corona radiata)
Clinical Manifestations of Pure Motor Hemiparesis
Weakness including the face, arm and leg in one side of the body in the absence of ‘cortical signs’ (aphasia, agnosia, neglect, apraxia, or hemianopia) or sensory deficit
Clinical Manifestations of Pure Sensory Stroke
Numbness of the face, arm and leg on one side
Clinical Manifestations of Ataxic Hemiparesis
Ipsilateral weakness, limb ataxia that is out of proportion to the motor deficit
Negative cortical signs
(+) dysarthria, nystagmus, gait deviation
Clinical Manifestations of Sensorimotor Stroke
Weakness and numbness of the face, arm and leg on one side
Clinical Manifestations of Dysarthria Clumsy Hand
Facial weakness, Dysarthria, dysphagia, slight weakness clumsiness of one hand
What are the lacunar syndromes?
Pure Motor- 45-57% Pure Sensory- 7-18% Ataxic Hemiparesis- 3-18% Sensorimotor Stroke 15-20% Dysarthria- Clumsy Hand Syndrome- 2-6%
