lacunar stroke types

Question 1

pure motor stroke

Answer 1

Posterior limb of the internal capsule (most common)
May also involve striatum, corona radiata, basal pons, medial medulla
Often caused by occlusion of the lenticulostriate artery
Contralateral hemiparesis of the face, arm, and leg (causes circumduction gait)
In some cases, dysarthria
No sensory impairment
Most common type of lacunar stroke (> 50%)

Question 2

pure sensorry stroke

Answer 2

Thalamus (most common)
May also involve the posterior limb of the internal capsule, pontine tegmentum, corona radiata
Contralateral numbness and paresthesia of the face, arm, and leg

Question 3

sensiromotor stroke

Answer 3

Posterior limb of the internal capsule (most common)
May also involve the thalamus, lateral medulla, putamen
Contralateral hemiparesis and sensory impairment

Question 4

ataxic hemiparesis

Answer 4

Posterior limb of the internal capsule (most common)
May also involve the corona radiata, thalamus, cerebral peduncle, pons
Ipsilateral weakness with impaired coordination (e.g., ataxia, gait instability) [17][18]

Question 5

dysarthria- clumsy hand syndrome

Answer 5

Caudate, posterior limb of the internal capsule, putamen, base of the pons
Contralateral facial and hand weakness with dysarthria

Question 6

hemiballismus

Answer 6

Caudate nucleus, putamen, thalamus, globus pallidus, corona radiata, subthalamic nucleus
Contralateral, involuntary, large flinging movements of the arm or leg

Question 7

infarction of the posterior limb of the internal capsule

Answer 7

Infarction of the posterior limb of the internal capsule is the most common type of lacunar stroke and may manifest clinically with pure motor stroke, pure sensory stroke (rare), sensorimotor stroke, dysarthria-clumsy hand syndrome, and/or ataxic hemiparesis.

Question 8

the internal capsule

Answer 8

A deep subcortical structure that lies between the basal ganglia and is comprised of the anterior limb, genu, and posterior limb. Contains motor (corticospinal and corticobulbar) and somatosensory projection fibers, which form the corona radiata.

Question 9

circumduction gait

Answer 9

Hemiplegic gait

An abnormal gait in which the leg does not flex at the knee and ankle, and with each step is rotated away from the body, then towards it, which forms a semicircle. Typically associated with extensor hypertonia in the lower limb.