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Regardless of the choice, the proportional
characteristics of the movement remain
nearly the same. Again, the basal ganglia
function in close association with the
cerebral cortex.

In patients with severe lesions of the
basal ganglia, these timing and scaling
functions are poor or nonexistent.

One important cortical area is the
posterior parietal cortex, which is the
locus of the spatial coordinates for motor
control of all parts of the body, as well as
for the relation of the body and its parts
to all its surroundings.

Damage to the posterior parietal cortex area does not produce simple deficits of sensory perception,
such as loss of tactile sensation, blindness, or deafness. Instead, these lesions produce an inability to
accurately perceive objects through normally functioning sensory mechanisms, a condition called
agnosia.

7.4. Neurotransmitters in the basal ganglia system.

There are different neurotransmitters in different parts of the body:

Dopamin

From putamen to
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substantia nigra. Carries
inhibitory information of the spinal
stimulatory cord.