GENERAL HISTOLOGY

NERVOUS SYSTEM SPECIAL SENSE

CEREBELLUM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Dysmetria is due to the lesion of
A
Archicerebellum
B
Paleocerebellum
C
Neocerebellum
D
None of the above
Explanation: 

Detailed explanation-1: -Dysmetria is a common finding seen in individuals with lesions of the cerebellum, which is the part of the central nervous system that integrates visual, spatial, and other sensory inputs with motor control in order to coordinate and plan movement as well as maintain balance.

Detailed explanation-2: -Causes. The actual cause of dysmetria is thought to be caused by lesions in the cerebellum or by lesions in the proprioceptive nerves that lead to the cerebellum that coordinate visual, spatial and other sensory information with motor control.

Detailed explanation-3: -Dysmetria occurs due to an injury in the cerebellum or nerves that connect to the cerebellum. This is part of the brain that processes visual, spatial, and other sensory inputs to coordinate and plan movements. The cerebellum also helps a person maintain balance.

Detailed explanation-4: -The consequences include a wide and staggering gait, with little impairment of arm or hand movements. Thus, the topographical organization of the cerebellum allows cerebellar damage to disrupt the coordination of movements performed by some muscle groups but not others.

Detailed explanation-5: -It is typically seen with acute hemispheric lesions and is often accompanied by hyporeflexia. Hypotonia likely results from decreased fusimotor activity resulting in decreased muscle spindle afferent response. It is usually a transient phenomenon after an acute lesion but can be seen in chronic lesions as well.

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