Exam 10: Vision and Visual Perception

The parvocellular system is specialized for:

If a stroke patient can identify objects and faces,but cannot tell if they are moving,he or she is showing signs of:

Rods are most numerous in the periphery of the retina.

As BJ walked into the matinee showing on that sunny Saturday,he was stumbling blindly.Although his pupils had dilated fully in a matter of seconds,BJ was quite night blind for some minutes until his eyes resynthesized adequate ___ to see in the dark.

Information from the right half of the visual field is transmitted to the right cerebral hemisphere.

There are approximately ___ light receptors in the human eye.

As stated in the Application,the gene ___ has been implicated in a genetic deficiency of photopigments.

A cone:

The ___ is a flexible tissue that allows us to focus on objects at different distances.

The dorsal stream of the visual system is involved in recognizing ___,whereas the ventral stream is involved in recognizing ___.

The magnocellular system is involved with analysis of color and object identity.

The ___ provides better visual acuity than the rest of the retina.

Neglect probably occurs because of:

When light hits photoreceptors,the photoreceptors ___,and the bipolar cells ___.

Human patients with deteriorating retinas who received transplants of ___ have shown improvement in visual acuity.

Photoreceptors are unusual because these cells:

The rod photopigment,___,is ___ sensitive to light than the cone photopigment,___.

Rods in the retina:

Humans can "see" only about ___ of the entire electromagnetic spectrum.

A light that stimulates receptors in the ___ of an off-center on-surround cell's receptive field will result in ___.