7.1 looking at neuronal function

Question 1

which technology has the BEST time resolution?

Answer 1

MEG

Question 2

which scan measures the tiny magnetic fields produced when groups of neurons are active

Answer 2

MEG

Question 3

the dorsal cell columns in the facial motor nucleus that innervate superior facial muscles do not receive input from _______

Answer 3

the primary motor cortex

Question 4

CNS disorders can be associated with abnormal _____

Answer 4

gait

Question 5

which scan uses radiolabelled compounds with photon emissions?

Answer 5

PET

Question 6

which technology has the worst spatial resolution?

Answer 6

MEG

Question 7

which technology has the 2nd best spatial resolution?

Answer 7

PET

Question 8

cranial nerves that innervate the intrinsic muscles of the eye

Answer 8

III, IV, VI - come off the brainstem

Question 9

unilateral injury to motor areas in lateral frontal lobe (primary motor and premotor cortex) causes

Answer 9

difficulty controlling contralateral muscles around mouth, but retain the ability to symmetrically raise their eyebrows, wrinkle their forehead and squinty

Question 10

which scans can localise areas of increase brain function in the performance of tasks?

Answer 10

fMRI, PET, MEG

Question 11

damage to the facial motor nucleus or its nerve afferents affects what?

Answer 11

all muscles of facial expression on the side of the legion - this is expected

Question 12

when connections b/w brain and spinal cord are damaged, the normal plantar response to foot stroke can be replaced by ______

Answer 12

extensor plantar responsor (babinski sign)

Question 13

the most important sign in neurology is the

Answer 13

monosynaptic stretch reflex

Question 14

which technology has the worst time resolution (100s of seconds)

Answer 14

Positron emission Tomography

Question 15

what happens in decerebrate rigidity?

Answer 15

extenors dominate - lie supine

Question 16

which scans are used most in living people

Answer 16

CT scans and MRI

Question 17

which scan uses x-rays?

Answer 17

CT scan

Question 18

dorsal cell columns in the facial motor nucleus that innervate superior facial muscles are governed by ______ in the ____

Answer 18

premotor areas in the anterior cingulate gyrus

Question 19

cranial nerve from the middle of the pons that has mostly somatic function

Answer 19

V

Question 20

which technology has the middle time resolution ?

Answer 20

fMRI

Question 21

the olfactory tract is where

Answer 21

just above the cribiform plate

Question 22

what are neuroscientists looking for?

Answer 22

reductionist, causal mechanistic explanations of system behaviour

Question 23

what happens in decorticate rigidity

Answer 23

extensors dominate in legs, flexors in arms (arms up)

Question 24

which scan uses protons in a magnetic field?

Answer 24

MRI

Question 25

which scan finds areas with increased oxygen supply during use?

Answer 25

fMRI

Question 26

which technology has the best spatial resolution?

Answer 26

fMRI