GENERAL HISTOLOGY

EXCRETORY SYSTEM

CORTEX

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What does the primary motor cortex do?
A
Spatial guidance of reaching
B
To generating neural impulses that pass down to the spinal cord and control the execution of movement
C
Planning of sequences of movements
D
Initial movement of trunk muscles in the body
Explanation: 

Detailed explanation-1: -In that view, a neuron in the motor cortex sends an axon or projection to the spinal cord and forms a synapse on a motor neuron. The motor neuron sends an electrical impulse to a muscle. When the neuron in the cortex becomes active, it causes a muscle contraction.

Detailed explanation-2: -The primary function of the motor cortex is to generate signals to direct the movement of the body. It is part of the frontal lobe and is anterior to the central sulcus.

Detailed explanation-3: -The corticospinal tract carries motor signals from the primary motor cortex in the brain, down the spinal cord, to the muscles of the trunk and limbs. Thus, this tract is involved in the voluntary movement of muscles of the body.

Detailed explanation-4: -The Primary Motor Cortex: Upper Motor Neurons That Initiate Complex Voluntary Movements.

Detailed explanation-5: -Primary Motor Cortex Functions In a normal functioning primary motor cortex, signals cross over the center of the body to activate muscles on the opposite side. This means that the movements on the right side of your body are controlled by the left hemisphere of the primary motor cortex, and vice versa.

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