The correct pathway for the transmission of an impulse from the photoreceptor cells to the visual cortex in the brain begins in the rods/cones and continues along the
A) optic tract, optic chiasma, optic nerve, thalamus, optic radiations, occipital lobe
B) optic nerve, optic chiasma, optic tract, thalamus, optic radiations, occipital lobe
C) optic nerve, optic chiasma, optic radiations, thalamus, optic tract, occipital lobe
D) optic radiations, optic chiasma, optic nerve, thalamus, optic tract, occipital lobe

Question

Quizplus · Accepted Answer

The correct pathway for transmission of an impulse from the photoreceptor cells to the visual cortex in the brain begins with the optic nerve, which carries information from the retina to the thalamus. At the optic chiasma, fibers from the nasal halves of each retina cross over to the opposite side of the brain, while fibers from the temporal halves remain on the same side. From the chiasma, the fibers continue along the optic tract to the thalamus, where they synapse with neurons that carry the visual signal to the primary visual cortex in the occipital lobe. The optic radiations refer to the fibers that transmit visual information from the thalamus to the visual cortex. Therefore, the correct pathway is optic nerve, optic chiasma, optic tract, thalamus, optic radiations, and occipital lobe, which is represented by option B.

The Correct Pathway for the Transmission of an Impulse from the Photoreceptor