NEUROBIOLOGY 2 ND EDITION
Which part of the brain is the major target of the retinofugal projection in nonmammalian
vertebrates?
A. Tectum of the midbrain
B. Pretectum
C. Part of the hypothalamus
D. Optic nerve - answers Tectum of the midbrain
Which of the following is the function of direction-selective striate cortex neurons?
A. Analysis of object shape
B. Analysis of object motion
C. Analysis of object color
D. Analysis of object meaning - answers Analysis of object motion
James, age 22, was riding a motorbike when he had an accident. A neuropsychological
test revealed that James suffered extensive damage to area V4 in the ventral stream.
What is the most likely deficit resulting from a V4 lesion?
A. Peripheral vision
B. Total vision
C. Motion perception
D. Color perception - answers Color perception
Which of the following is a role proposed for movement sensitive neurons in the parietal
area called MST?
A. Navigation
B. Shape perception
C. Color perception
D. Peripheral vision - answers Navigation
Which of the following is the common characteristic in the receptive fields in the
ganglion cells of the retina, the LGN, and striate cortex neurons in layer IVC?
A. Center surround antagonism
B. Elongated bar of light moving across the receptive field
C. Optimal orientation of a bar of light
D. Radial column of cells from pia to white matter - answers Center surround
antagonism
Where are the first binocular neurons encountered in the retinofugal projections?
A. LGN
B. Striate cortex layers superficial to layer IVC
C. Striate cortex layer IVC
D. Eye - answers Striate cortex layers superficial to layer IVC
, Mr. Stewart underwent a surgery to remove a tumor in his brain. During the surgery,
lesions developed in the optic radiations. What is the potential impact of these lesions?
A. Blindness
B. Color loss
C. Shape perception loss
D. Peripheral vision loss - answers Color loss
Susan fell down the staircase and injured her head, causing a transection of the left
optic nerve. What is the consequence of this lesion?
A. Blindness in the left visual field
B. Blindness in the left eye
C. Blindness in the right visual field
D. Blindness in the right eye - answers Blindness in the left eye
Which of the following is a region of sensory surface that, when stimulated, changes the
membrane potential of a neuron?
A. Receptive field
B. Retinotopy
C. Retinal ganglion cells
D. LGN neurons - answers Receptive field
Which of the following is the major source of synaptic input to the LGN?
A. Striate cortex
B. Retinal ganglion cells axons
C. Extrastriate cortex
D. Neurons in the brain stem - answers Striate cortex
Which ganglion cell axons cross to the opposite side of the brain at the optic chiasm?
A. Right eye axons
B. Left eye axons
C. Axons from the temporal retinal
D. Axons from the nasal retina - answers Axons from the nasal retina
What is a primary similarity in the visual receptive fields of LGN neurons and the
ganglion cells that feed them?
A. Both have center surround receptive fields
B. Both display orientation selectivity
C. Both are insensitive to wavelength
D. Both are binocular - answers Both have center surround receptive fields
Which of the following describes spiny stellate cells in striate cortex?
A. Spiny stellate cells are found in layer IVC.
B. Spiny stellate cells are characterized by a single thick apical dendrite.
C. Spiny stellate cells are triangular in shape and have multiple basal dendrites.
D. Spiny stellate cells project to subcortical structures. - answers Spiny stellate cells are
triangular in shape and have multiple basal dendrites.