Q: Which equation best represents the number of fibers in the lateral corticospinal tract from both hemispheres?

$$750,000 \times 2 = 1,500,000$$

Question 1

Which cortical area is primarily responsible for the initiation and execution of voluntary movement?

Accepted Answer

Primary Motor Cortex (M1)

Question 2

A patient is unable to perform bimanual tasks, such as tying shoelaces, but can perform single-handed movements. Which brain region is most likely affected?

Accepted Answer

Supplementary Motor Area (SMA)

Question 3

Which of the following best describes the function of the lateral corticospinal tract?

Accepted Answer

Primarily controls distal muscles on the contralateral side

Question 4

Mirror neurons are found in which motor area, and what is their significance?

Accepted Answer

Premotor Area (PMA); they fire both when performing and observing an action

Question 5

Which descending tract is most involved in stabilizing posture and originates from the reticular formation?

Accepted Answer

Reticulospinal tract

Question 6

A lesion in the medial vestibulospinal tract would most likely affect which function?

Accepted Answer

Positioning of head and neck

Question 7

Which statement best describes the somatotopic organization of the primary motor cortex (M1)?

Accepted Answer

Areas requiring detailed motor control are most highly represented

Question 8

Which motor area is most involved in planning movements based on internal cues, such as learned sequences?

Accepted Answer

Supplementary Motor Area (SMA)

Question 9

Which of the following is TRUE regarding the anterior (ventral) corticospinal tract?

Accepted Answer

It bilaterally activates interneurons and motor neurons of proximal and axial muscles

Question 10

A person is unable to visually guide their hand to pick up an object, but can perform internally-cued movements. Which area is most likely damaged?

Accepted Answer

Premotor Area (PMA)

Question 11

Which tract is thought to play a role in the coordination of head and eye movement?

Accepted Answer

Tectospinal tract

Question 12

Which equation best represents the number of fibers in the lateral corticospinal tract from both hemispheres?

Accepted Answer

$$750,000 	imes 2 = 1,500,000$$

Question 13

Which of the following is a correct sequence for voluntary movement according to the motor plan model?

Accepted Answer

Specify goal → Create plan → Initiate/execute movement → Compare executed movement with plan

Question 14

Which motor system is primarily responsible for goal-directed limb movements and distal muscle control?

Accepted Answer

Lateral (dorsal) motor system

Question 15

Which of the following is NOT a major input to the primary motor cortex (M1)?

Accepted Answer

Occipital cortex

Question 16

A stroke patient has difficulty with postural tone and axial muscle control. Which descending tract is most likely affected?

Accepted Answer

Anterior (ventral) corticospinal tract

Question 17

Which tract originates from the red nucleus, crosses the midline in the midbrain, and is involved in goal-directed limb movements?

Accepted Answer

Rubrospinal tract

Question 18

Which of the following best describes the difference between upper and lower motor neurons?

Accepted Answer

Lower motor neurons innervate skeletal muscle; upper motor neurons originate in cortex and brainstem

Question 19

Which motor area receives multisensory inputs, especially visual signals, and is involved in sequencing motor synergies using sensory cues?

Accepted Answer

Premotor Area (PMA)

Brain Control of Movement: Motor Systems and Skilled Performance

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