cbns 106 final exam questions & answers 2024/2025
Objects in the EXTREME RIGHT (far right periphery) of your visual world:
a) stimulate the TEMPORAL hemiretina of your RIGHT eye
b) stimulate the TEMPORAL hemiretina of your LEFT eye
c) stimulate the NASAL hemiretina of your RIGHT eye
d) are...
Objects in the EXTREME RIGHT (far right periphery) of your visual world:
a) stimulate the TEMPORAL hemiretina of your RIGHT eye
b) stimulate the TEMPORAL hemiretina of your LEFT eye
c) stimulate the NASAL hemiretina of your RIGHT eye
d) are represented in the LEFT primary visual cortex
e) c and d - ANSWERSe) c and d
The lateral geniculate nucleus on the RIGHT side of the brain:
a) contains a complete representation of the LEFT visual world
b) contains a complete representation of the RIGHT visual world
c) receives input from the nasal hemiretina of the left eye
d) a and c are correct - ANSWERSd) a and c are correct
The receptive field of a neuron is:
a) The area of the environment/body in which a stimulus will always excite the cell
b) The area of the environment/body in which a stimulus will always inhibit the cell
c) The region of the environment/body in which a stimulus will affect the neuron's firing rate
d) The best stimulus, usually a large circle, for a neuron in the visual system - ANSWERSc) The region of
the environment/body in which a stimulus will affect the neuron's firing rate
A lesion in the UPPER BANK of the calcarine fissure in the PRIMARY VISUAL CORTEX on the
RIGHT side of the brain will cause:
a) blindness in the left eye
b) loss of vision in the UPPER visual field of both eyes
c) loss of vision in the NASAL field of both eyes
,d) loss of vision in the LOWER LEFT quadrant of the visual field of both eyes
e) loss of vision in the UPPER LEFT quadrant of the visual field of both eyes - ANSWERSd) loss of vision in
the LOWER LEFT quadrant of the visual field of both eyes
Cutting the RIGHT OPTIC NERVE will cause:
a) no visual deficits, because you still have the nerve on the other side
b) Blindness in the LEFT eye
c) Blindness in the LEFT visual field of both eyes
d) Loss of ability to perceive objects in ANY part of the LEFT visual world
e) Blindness in the RIGHT eye - ANSWERSe) Blindness in the RIGHT eye
The central portion of the left side of the visual field is represented:
a) in left primary visual cortex at the most posterior portion of the calcarine fissure
b) in right primary visual cortex at the most posterior portion of the calcarine fissure
c) in the LEFT primary visual cortex deep (anteriorally) along the calcarine fissure
d) in the RIGHT primary visual cortex deep (anteriorally) along the calcarine fissure
e) a and b - ANSWERSb) in right primary visual cortex at the most posterior portion of the calcarine
fissure
Adding glutamate to a slice of the cat spinal cord maintained in a dish:
a) causes simultaneous bursting in Left and Right ventral roots
b) causes alternate bursting in Left and Right ventral roots
c) mimics the effects on activity in the ventral roots of dorsal root stimulation
d) b and c
e) none of the above - ANSWERSd) b and c
CPGs in the vertebrate spinal cord:
a) can be switched on by sensory input
b) can be activated by stimulation of the mesencephalic locomotor nucleus
, c) can be modulated by coordinating fibers from other CPGs
d) all of the above
e) none of the above - ANSWERSd) all of the above
In a mesencephalic cat suspended on a treadmill, which of the following is true?
a) The animal shows some reflex responses but can't be made to walk
b) A mesencephalic cut is lethal
c) The animal will walk faster as the stimulation current delivered to the MLn is increased
d) Stimulation of the motor cortex will induce movement in the contralateral legs
e) none of the above - ANSWERSc) The animal will walk faster as the stimulation current delivered to the
MLn is increased
Stimulation of cat mesencephalic locomotor nucleus should (think about this):
a) produce a pattern of walking, trotting and galloping as the current intensity is increased
b) result in activation of spinal central pattern generators for locomotion
c) result in an alternating pattern of activity in corresponding left and right ventral roots
d) result in an alternating pattern of activity in alpha motor neurons innervating the left and right
legs
e) all of the above - ANSWERSe) all of the above
When a person is asked to perform a complex sequence of finger movements and brain activity is
recorded by PET:
a) primary motor cortex will show increased activity
b) mesencephalic locomotor nucleus will show increased activity
c) supplementary motor cortex show increased activity
d) all of the above
e) a and c are both correct - ANSWERSe) a and c are both correct
The expression "running around like a chicken with your head cut off" is derived from farmers'
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