Neuro 8: Motor Cortex and Posture

1.

1 point

Standing at the free throw line during the championship game, LeBron James closes his eyes and mentally rehearses the action of shooting a free throw. Which area(s) of his cortex are most active during this activity?

Somatosensory cortex

Medial premotor area

Posterior parietal cortex

Primary visual cortex

Primary motor cortex

2.

1 point

Which area of the premotor cortex is involved in transforming visual information about the location of objects?

SMA

PMd

PMv

M1

M2

3.

1 point

Brodman's area 6 is associtated with which region of the cortex?

Primary auditory cortex

Frontal eye field

Primary motor cortex

Premotor cortex

Somatosensory cortex

4.

1 point

Which of the following is directly responsible for postural control?

Spinal cord

Motor cortex

Basal ganglia

Cerebellum

Brainstem

5.

1 point

All of the CN nuclei are supplied bilaterally by the corticobulbar tract EXCEPT...

Trigeminal

Nucleus ambiguous

Accessory

Hypoglossal

Upper Facial

Lower Facial

6.

1 point

A tumor that impinged upon the genu of the internal capsule would most likely have which of the following effects?

Deviation of the tongue to one side

Inability to raise eyebrows

Loss of fine motor control of the fingers

Positive Babinski reflex

Paralysis of the neck muscles

7.

1 point

The corticospinal tract is composed of fibers from which cortical areas?

Primary somatosensory cortex

Primary motor cortex

Posterior parietal cortex

All of these

Premotor cortex

8.

1 point

Which of the following fiber tracts will form a major projection to the cerebellum?

Cortico-tectal

Cortico-reticular

Cortico-rubro

Cortico-pontine

Cortico-thalamic

9.

1 point

Which of the following tracts does NOT decussate?

Lateral corticospinal

Medial vestibulospinal

Rubrospinal

Tectospinal

Pontine reticulospinal

10.

1 point

Which of the following tracts is responsible for frowning during an incomprehensible lecture?

Corticobulbar

Corticorubral

Corticotectal

Corticospinal

Corticothalamic

11.

1 point

Which cytoarchitectural layer would you expect to be absent in the premotor cortex?

IV

V

II

III

VI

12.

1 point

Betz cells are associated with which layer of the motor cortex cytoarchitechture?

VI

II

I

V

IV

13.

1 point

Your patient comes to you complaining of a shaky hand. Upon neurological examination, you find that it only occurs when you ask them reach for something. Where would you expect a neurological problem be located?

Spinal cord

Motor cortex

Brainstem

Cerebellum

Basal ganglia

14.

1 point

The reticulospinal tract supplies...

Flexors

Both extensor and flexors

Neither extensors nor flexors

Extensors

15.

1 point

Which of the following is NOT associated with extrapyramidal lesions?

Tremors

Clasp knife effect

Normal tendon reflexes

Hypotonia of extensors in all four limbs

Absent Babinksi sign

16.

1 point

A lesion in the superior colliculus would be likely to damage which tract(s)?

Vestibulospinal

Rubrospinal

Reticulospinal

Corticospinal

Tectospinal

17.

1 point

What is the only function that can't be recovered after a CST lesion?

Fine movement of toes

Fine movement of fingers

Extension of lower limbs

Flexion of lower limbs

Flexion of upper limbs

18.

1 point

Which of the following is NOT a function of the primary motor cortex?

All of these are functions of the primary motor cortex

Influences the extent of movement

Controls the speed of movement

Influences the force in a given muscle

Specifies the direction of reach

19.

1 point

A patient that loses their balance upon closing their eyes is said to have a positive _______ sign.

Betz

Lissauer

Babinski

Deiter

Romberg