The receptive field of a somatic sensory neuron is the region of the skin within which a tactile stimulus evokes a sensory response in the cell or its axon (Boxes A and B). ... The importance of receptive field size is easy to envision.
What is receptive field?
The receptive field encompasses the sensory receptors that feed into sensory neurons and thus includes specific receptors on a neuron as well as collectives of receptors that are capable of activating a neuron via synaptic connections.
What is a receptive field in the skin quizlet?
The receptive field is an area of skin surface over which stimulation results in a significant change in the firing rate of action potentials . ... Small receptive fields increase the ability to discern two stimuli that are close together.
What is a receptive field example?
For example, it could be a hair in the cochlea or a piece of skin, retina, or tongue or other part of an animal’s body . Receptive fields have been identified for neurons of the auditory system, the somatosensory system, and the visual system.
What is a receptive field quizlet?
Receptive field. – Receptive field – region of a sensory surface that, when stimulated, causes a change in the firing rate of a neuron that “monitors” that region of the surface; the receptive field of an RGC is the region of the retina occupied by the photoreceptors to which the RGC is connected.
What part of body has largest receptive field?
Retinal ganglion cells located at the center of vision, in the fovea, have the smallest receptive fields and those located in the visual periphery have the largest receptive fields.
Which body part likely has the smallest receptive field and why?
Furthermore, the size of a neuron’s receptive field is related to the body area innervated/represented. The receptive fields of neurons innervating/ representing the finger pads, lips, and tongue are the smallest, whereas those of neurons innervating/representing the shoulders, back and legs are the largest.
What is the meaning of receptive field size?
“...the receptive field size for the layer. This is the size (in pixels) of the local image region that affects a particular element in a feature map .” which makes sense with the traditional definition of a receptive field. Its usually thought as the number of pixels that affect a particular node in the feature map.
What affects receptive field size?
The receptive field size of a unit can be increased in a number of ways. One option is to stack more layers to make the network deeper , which increases the receptive field size linearly by theory, as each extra layer increases the receptive field size by the kernel size.
What is the relationship between a receptive field and reception?
Sensory transduction is the process of converting that sensory signal to an electrical signal in the sensory neuron. The process of reception is dependent on the stimuli itself, the type of receptor, receptor specificity , and the receptive field, which can vary depending on the receptor type.
How do we measure a receptive field?
Functional magnetic resonance imaging (fMRI) was used to estimate the average receptive field sizes of neurons in each of several striate and extrastriate visual areas of the human cerebral cortex.
What is a receptive field vision?
Definition. The term receptive field refers to the region of visual space where changes in luminance influence the activity of a single neuron . Also known as the classical receptive field (CRF).
What is receptive field in deep learning?
Receptive fields are defined portion of space or spatial construct containing units that provide input to a set of units within a corresponding layer . The receptive field is defined by the filter size of a layer within a convolution neural network.
What is the center surround receptive field?
A type of receptive field characteristic of retinal ganglion cells and bipolar cells with a central ON area in which stimulation tends to excite neural responses and a surrounding OFF area in which stimulation tends to suppress neural responses by lateral inhibition, so that the strongest response occurs when only the ...
What information does the brain use to determine the intensity of a stimulus?
How does the brain determine the intensity of a stimulus? By looking at the number of receptors activated and the frequency of action potentials from them . Also looks at the quality of the receptors that are activated. Receptors have different thresholds of activation – this can tell us how large the stimulus was.
What is meant by Phototransduction quizlet?
Phototransduction. Process by which light energy is converted into graded receptor potential . Rods and cones. Are vulnerable to damage; degenerate if retina detached; destroyed by intense light; renewed every 24 hours (outer segment)
