Chapter 8 Test

Question 1

Which of the following structures is not involved in the sensorimotor system?

• cerebellum
• amygdala
• primary motor cortex
• basal ganglia

Answer 1

Amygdala

Question 2

The motor system is organized

• serially
• circularly
• into the dorsal and ventral streams
• hierarchically

Answer 2

Hierarchically

Question 3

What motor function does the dorsolateral prefrontal cortex (DLPFC) carry out?

• abstract motor planning
• integration with visual input
• primary point of departure for signals from the cortex to the peripheral system

Answer 3

Abstract motor planning

Question 4

What good is the stretch (or “knee jerk”) reflex?

Answer 4

It helps us to maintain posture and balance.

Question 5

Many neurons in the primary motor cortex fire just before movement. According to the conventional view of the motor cortex, whether or not a particular neuron fires is largely determined by the

• amplitude of the movement
• speed of the movement
• direction of the movement
• acceleration of the movement

Answer 5

Direction of the movement

Question 6

The consequences of cerebellum damage include

Answer 6

Inability to precisely control the direction, force, velocity, and amplitude of movements.

Severe disturbances of balance, gait, speech, and eye movement.

Difficulty in maintaining steady postures.

Inability to adapt patterns of motor output to changing conditions.

Question 7

The withdrawal reflex depends on

• both excitation and inhibition of motor cortex.
• both excitation and inhibition in the spinal cord.
• the basal ganglia.
• the primary motor cortex.

Answer 7

Both excitation and inhibition in the spinal cord.

Question 8

The current view of the motor cortex function holds that

• movements are coded according to their directions.
• movements are coded in terms of their end points.
• motor cortex is not essential for voluntary motor control.

Answer 8

Movements are coded in terms of their end points.

Question 9

The primary motor cortex is located in the

• precentral gyrus
• superior temporal gyrus
• postcentral gyrus
• inferior temporal gyrus

Answer 9

Precentral gyrus

Question 10

Which of the following is not a characteristic of the posterior parietal cortex related to motor control?

• integrate information about body part location
• directing attention
• integrate information about the location of external objects
• coordinates motor plan with body position

Answer 10

Coordinates motor plan with body position.