6.2 lower motoneuron

Question 1

damage to the supplementary motor cortex causes

Answer 1

problems in planning and sequencing movements (apraxia)

Question 2

the motor cortex influences the spinal cord and brainstem via the _______

Answer 2

corticospinal tract

Question 3

this is in the middle of the motor control hierarchy

Answer 3

brainstem

Question 4

where does the corticalspinal tract cross to?

Answer 4

the contralateral side in the medulla

Question 5

this is at the top of the motor control hierarchy

Answer 5

cerebral cortex

Question 6

the motor control hierarchy

Answer 6

cerebral cortex -> brainstem -> cerebellum

Question 7

what kind of information do the ventral tracts carry?

Answer 7

maintenance of posture

Question 8

this is at the bottom of the motor control hierarchy

Answer 8

cerebellum

Question 9

after crossing, the corticospinal tract continues down the spinal cord in this…

Answer 9

the dorsolateral white matter - synapses with interneurons and directly w/ motoneurons

Question 10

what influences the ventral tracts

Answer 10

visual, vestibular and proprioceptive activity

Question 11

the ventral tracts

Answer 11

tectospinal, vestibulospinal, reticulospinal

Question 12

damage to the primary motor cortex causes ____

Answer 12

weakness

Question 13

stimulation of the primary motor cortex produces ______?

Answer 13

contralateral movements