Neuromuscular Flashcards
(266 cards)
MCA lesion characteristics
Contralateral Hemiplegia, Face, UE>LE
Contralateral Hemisensory loss UE>LE
Homonymous Hemianopsia
Superior division of MCA lesion
Expressive Aphasia (effects Broca’s area and frontal eye fields)
Inferior division of MCA lesion
Receptive aphasia (effects wernicke’s area and visual radiation )
Decreased graphesthesia, sterognosis on contralateral side, lack of awareness (hemineglect)
Homunculus ACA
Trunk, Leg Foot (motor), trunk, leg, foot, genitals, some arm sensory loss
MCA homunculus
Face, hand arm motor loss
Face, hand, tongue sensory loss (larger tongue sensory loss)
PCA stroke characteristics
Contralateral sensory loss with involuntary movements like choreoathetosis, tremor, hemibalismus, transient contralateral hemiparesis, homonymous hemianopsia
ACA-MCA watershed infarct
Trunk and proximal UE are affected !!! Severe drop in BP due to carotid stenosis or occlusion of the ICA
MCA-PCA watershed infarct:
Higher order visual processing is affected
ACA lesion characteristics
Contralateral paralysis and sensory loss affecting the LE, may lose control of micturition because bladder control involves frontal gyri and anterior cingulate gyrus
Why would an occlusion of the stem of MCA have leg involvement?
Gives off lenticulostriate arteries that go to BG and internal capsule (posterior limb of the IC gives off lower limb fibers)
Lesion of the posterior limb of internal capsule
Lower face weakness, hemi anesthesia, spastic hemiplegia (more severe distally) , Left homonymous hemianopia
Paracentral lobule lesion comes from what artery and what happens
Anterior cerebral artery, C/L hemiplegia and hemiparesis (lesion of the pre central and post central gyrus)
R MCA sup. Division lesion
Contralateral hemiparesis (face, arm hand), contralateral sensory loss , NO HOMONYMOUS HEMIANOPIA
Neglect variable
expressive aphasia typically found
in those with right hemiplegia
what is astereognosis
inability to recognize objects by touch alone
ideomotor apraxia
person cannot do a task on command but can do it spontaneously
ideation apraxia
person lo longer gets the idea of how to do a routine task
when does global aphasia occur
with occlusion to the main stem of the middle cerebral artery
what is conduction/associative aphasia:
damage to the arcuate fasciculus, patient struggles with repeating phrases and word finding
akinesia
hard to initiate movements
chorea
rapid involuntary jerky movements
what is a movement pattern seen in Huntington’s
chorea, rapid involuntary jerky movements
decorticate=
flexion contraction in upper extremities and extension in the lower extremitites , damage to red nucleus in the midbrain
decerebrate=
extension in UE and LE, injury to the brainstem above the vestibular nucleus an below the red nucleus