Speech Motor System

Question 1

Clinical Signs of LMN Lesion:

primary:
-…. usually of ?
hypor?
hypo? manifesting as?

secondary:
muscle ?
-

Answer 1

weakness, usually of single muscle or small groups of muscles

• hyporeflexia (diminished reflex)
• hypotonia manifesting as flaccidity

denervation atrophy
fasciculations

Question 2

CN V Lesion:
LMN lesions of CN V lead to ?

bilateral lesions canoe devastating because the jaw ? cannot be ? or moves with ?

thereby preventing?

Answer 2

paresis and eventual atrophy of masticatory muscles on paralysed side

hangs open, cannot be closed, moves with limited range

accurate articulation

Question 3

CN VII Lesion:
LMN lesions of the CN VII can ?

fasciculation’s may be seen in the ?

Such lesions affect all ?

Answer 3

paralyse and atrophy muscles on ipsilateral side of face leading to asymmetry

perioral chin

voluntary, emotional and reflex movements