The Brain - 9.3 - The Motor Functions
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TRUE or FALSE: The somatic motor division controls the voluntary muscles.
TRUE.
TRUE or FALSE: The somatic motor divisions controls the skeletal muscles.
TRUE.
The decision to make a voluntary muscular movement starts (originates) in the ______________ of the frontal lobe.
Motor Association Area
A “plan of action” is made by the ______________ of the frontal lobe.
Motor Association Area
The motor association area sends “a plan of action” of what muscles need to contract to the:
Primary motor cortex
The primary motor cortex contains:
The neurons that control the motor (efferent) neurons.
The primary motor cortex is located in the _______________ gyrus of the frontal lobe.
Precentral
The precentral gyrus is found _________ to the central sulcus.
Anterior (towards the front)
The precentral gyrus is part of the ___________ lobe.
Frontal
Axons from the primary motor cortex descend through the brainstem and travel down ___________ tracts of the spinal cord.
Descending
Most of the neurons from the primary motor cortex ______________ (cross to the other side) in the medulla oblongata.
Decussate
Most of the trunk, upper limbs, and lower limbs muscles are controlled by the ____________ side of the brain.
Opposite
Broca area is located usually on the left side of the _______________ lobe.
Frontal
What is the function of Broca area?
To make a “plan” of action for the muscle contractions of the larynx, tongue, cheeks and lips to form words used in speaking.
What part of the brain is important in maintaining muscle tone and posture, coordinating body movements and monitors the body’s position to help with balance?
The cerebellum – it allows us to move smoothly and help the frontal lobe out with minor adjustments to maintain our posture and equilibrium.