Exam 8: Action

Neurons in each half of the cerebellum synapse on targets in the thalamus and other subcortical structures, and therefore regulate the effectors on the side of the body.

The supplementary motor area SMA) is particularly active during externally guided movements.

Franz and colleagues 1996) asked a patient who had had his corpus callosum surgically severed to draw figures like the ones here, each simultaneously with a different hand. Compared to neurologically intact control participants, they found that this patient

Which of the following statements best describes the population vector associated with a reaching movement from left to right?

Hemiplegia is the

A patient has damage to the basal ganglia, particularly within the striatum, and demonstrates both chorea and hyperkinesia. What is your diagnosis?

Which of the following is NOT a part of the basal ganglia?

The fact that the population vector recorded in the motor cortex precedes the corresponding reaching movement indicates that motor cortex activity

When you first learn how to execute the complex motor sequence that comprises a slam dunk in basketball, a circuit including the is active. After much practice, once you have learned the sequence well, a second circuit involving the is active.

Single-cell recording studies have indicated that the may be especially important in the control of internally guided motor sequences, whereas the may be especially important in the control of externally guided motor sequences.

Neurons in the spinal cord that can mediate sequences of motor actions even in the absence of external sensory feedback signals are called

In performing a sequence of complex actions, such as playing the piano, each movement is planned primarily in relation to the immediately preceding and subsequent movements.

In the days following her stroke, Patient E cannot refrain from reaching out and grasping nearby objects even when she has been asked not to do so. This syndrome probably is the result of the abnormal dominance of the

Single-cell recording studies of the motor control of reaching movements have demonstrated that neurons in the motor cortex are selectively active based on the

Using single-cell recording, a researcher isolates a neuron in the motor cortex of a monkey that is extremely active when the monkey moves its arm from left to right. In subsequent trials, the animal is required to move its arm from the starting to the ending locations diagrammed here. Which, if any, of these additional trials will also increase activity in this neuron?

The two general subtypes of apraxia are

Which of the following types of motor behavior probably relies the most on the function of a central pattern generator?

Alpha motor neurons in the spinal cord communicate with muscle fibers by releasing acetylcholine, which influences muscle activity by

The neurotransmitter responsible for translating action potentials into mechanical actions at muscles is

seems) particularly important in the control and planning of complex motor sequences as opposed to simple movements.