Lecture 7 - Somatomotor System - Quiz 1/2

Question 1

Which Brodmann’s areas correspond to the primary somatosensory cortex?

Answer 1

Brodmann’s areas 4, 5, and 6.

Question 2

What shows that sensations from the entire body surface are represented in an orderly array or cortical patches posterior to the central sulcus?

Answer 2

The cortical homunculus

Question 3

Where is the first synapse of the spinothalamic tract found?

Answer 3

The posterior horn of the spinal column

Question 4

When does the human brain show plasticity?

Answer 4

Throughout life

Question 5

In which somatosensory area has topographic organization been demonstrated?

Answer 5

Dorsal posterior insula

Question 6

Which pathway is related to the sense of gravitational orientation?

Answer 6

Vestibular pathway

Question 7

T/F - The cerebellum is NOT part of the vestibular system

Answer 7

False

Question 8

T/F - Almost all affterents to the cerebellum synapse onto neurons in the cortex

Answer 8

True

Question 9

T/F - All afferents to cerebellum synapse onto neurons in the cortex

Answer 9

False

Question 10

T/F - The vestibular ganglion synapse in the cerebellar vermis and also in the fastigial nucleus

Answer 10

True

Question 11

Which “pain transducers” are found in the skin and tissues but not inthe brain?

Answer 11

Nociceptors

Question 12

What do specific nociceptors in the skin respond to?

Answer 12

Intense pressure, temperature, and chemical stimuli

Question 13

The “mirror” pain system is comprised of what areas of the brain?

Answer 13

Bilateral anterior insula, left anterior cingulate, and the left inferior parietal lobe

Question 14

When your heart is broken, it might be more accurate to say someone broke what area of the brain?

Answer 14

Insula

Question 15

T/F - The spinal stretch reflex is mediated by an inhibitory and an excitatory circuit

Answer 15

True

Question 16

T/F - The spinal stretch reflex involves activation of a stimulated flexor muscle group and inhibition of the antagonist muscles in the upper limb

Answer 16

True

Question 17

T/F - The spinal stretch reflex involves activation of both flexor and extensor muscles in the upper limb

Answer 17

False

Question 18

T/F - The spinal stretch reflex protects against damage

Answer 18

True

Question 19

T/F - The primary motor cortex corresponds to Broadmann’s area 3

Answer 19

False

Question 20

T/F - The primary motor cortex participates to motor planning

Answer 20

False

Question 21

T/F - The supplementary motor cortex (SMA) generates forceful movements

Answer 21

False

Question 22

T/F - The premotor cortex is responsible for sequential movements

Answer 22

False

Question 23

T/F - Cortical control of motor neurons does NOT involve the lateral corticospinal tract for modulation of movement based on sensory input

Answer 23

False

Question 24

T/F - Cortical control of motor neurons does NOT involve the ventral corticospinal tract for control of the head and neck

Answer 24

False

Question 25

T/F - Cortical control of motor neurons does NOT involve the dorsal posterior insula for fine control of the digits

Answer 25

True

Question 26

T/F - Cortical control of motor neurons does NOT involve Betz cells in the primary motor cortex that project to the spinal cord

Answer 26

False

Question 27

T/F - Cortical control of motor neurons does NOT involve cingulate motor areas

Answer 27

False

Question 28

T/F - The basal ganglia receive sensory input from the muscles

Answer 28

False

Question 29

T/F - The basal ganglia are linked to cortical regions

Answer 29

True

Question 30

T/F - The cerebellum is linked to cortical regions

Answer 30

True

Question 31

T/F - The cerebellum receives sensory input from the muscles

Answer 31

True

Question 32

T/F - The lateral premotor cortex contributes to integration across sensory modalities

Answer 32

True

Question 33

T/F - The premotor cortex sustains firing over a delay between sensory input and elicited motor output

Answer 33

True

Question 34

T/F - Reaching engages premotor area PMd

Answer 34

True

Question 35

T/F - Graping engages ventral premotor cortex PMv

Answer 35

True

Question 36

T/F - Gaze is primarily an unconscious, subcortical function

Answer 36

True

Question 37

T/F - Gaze involves stabilization of an image on the fovea of the eye

Answer 37

True

Question 38

T/F - Gaze involves saccadic, smooth pursuit and vergence movements

Answer 38

True

Question 39

T/F - Gaze does NOT include a mechanism to compensate for head movement

Answer 39

False

Question 40

T/F - Gaze involves a fixation system to suppress normal eye movement

Answer 40

True

Question 41

T/F - Saccades can be voluntary or involuntary

Answer 41

True

Question 42

T/F - Saccades may involve insula for resistance against a stimulus-induced movement

Answer 42

False

Question 43

T/F - Saccades are highly stereotypic in velocity profile

Answer 43

True

Question 44

T/F - Saccades involve interneurons in the brain

Answer 44

True

Question 45

T/F - Horizontal and vertical saccades are controlled by different brain networks

Answer 45

True

Question 46

T/F - Smooth pursuit movements of the eyes are initiated by the frontal eye fields

Answer 46

True

Question 47

T/F - The cerebellum is involved in prediction and error correction in smooth pursuit

Answer 47

True

Question 48

T/F - Parietal areas MT compute observed velocity

Answer 48

True

Question 49

T/F - MST in the STS responds and tracks occluded objects

Answer 49

True