Table of Contents
What is stimulus selectivity?
I added another paragraph because of a discussion I had about this last point on social media: selectivity implies that a neuron or brain area is tuned to a stimulus space and it can only exist if there is also a stimulus preference.
What is feature selectivity?
Neural feature selectivity has traditionally been studied using stimuli that can be described by a small number of parameters, so that the input/output function can be measured with sufficient detail. Such an approach is contingent on the fact that neurons are responsive to the class of stimuli used [1,2].
What is responsible for visual stimuli?
Visual stimuli pass via the optical nerve, the optic chiasma and the optic tracts, mainly to the occipital cortex, though some traverse the mesencephalon and interact with eye movement, vestibular activity and the muscles of the cervical spine.
What part of the brain responds to visual stimuli?
The primary visual cortex is found in the occipital lobe in both cerebral hemispheres. It surrounds and extends into a deep sulcus called the calcarine sulcus.
How is visual stimulus processed?
Visual reception occurs at the retina where photoreceptor cells called cones and rods give an image color and shadow. The image is transduced into neural impulses and then transferred through the optic nerve to the rest of the brain for processing.
How is visual stimuli processed?
The information from the retina — in the form of electrical signals — is sent via the optic nerve to other parts of the brain, which ultimately process the image and allow us to see. The primary visual cortex is densely packed with cells in many layers, just as the retina is.
What is an example of a stimulus in psychology?
A stimulus is any object or event that elicits a response. For example, when food is presented to a lab mouse as a reward for pressing a lever, the food is a stimulus, and the mouse will likely respond by pressing the lever again.
What is the Inferotemporal cortex?
IT cortex (inferior temporal or inferotemporal cortex) corresponds to cytoarchitectonic area TE. Inferior Temporal (IT) Cortex is the cerebral cortex on the inferior convexity of the temporal lobe in primates including humans.
What is the stimulus which causes the eye to respond and begin the vision process?
The moment light meets the retina, the process of sight begins. About 60 years ago, scientists discovered that each vision cell’s receptive field is activated when light hits a tiny region in the center of the field and inhibited when light hits the area surrounding the center.
What are three examples of a stimulus?
Examples of stimuli and their responses:
- You are hungry so you eat some food.
- A rabbit gets scared so it runs away.
- You are cold so you put on a jacket.
- A dog is hot so lies in the shade.
- It starts raining so you take out an umbrella.