receptive field

Examples of receptive field in the following topics:

• Integration of Signals from Mechanoreceptors

  • In the somatosensory system, receptive fields are regions of the skin or of internal organs.
  • Some types of mechanoreceptors have large receptive fields, while others have smaller ones.
  • Large receptive fields allow the cell to detect changes over a wider area, but lead to a less-precise perception.
  • Receptors with large receptive fields usually have a "hot spot": an area within the receptive field (usually in the center, directly over the receptor) where stimulation produces the most intense response.
  • The size of the receptive field of a single receptor could be estimated from that distance.

• Cutaneous Sensation

  • Four key types of mechanoreceptor have been described based on their response to stimulation and receptive field.
  • The receptive field—the region in which a receptor can sense an effect—can vary from small to large.
  • It demonstrates a rapid response and has a small receptive field; it is useful for detecting texture or movement of objects against the skin.
  • It demonstrates a slow response and has a large receptive field; it is good for detecting steady pressure or stretching, such as during the movement of a joint.
  • It demonstrates a fast response and has a large receptive field; it is useful for detecting large changes in the environment, such as vibrations.

• Reception

  • Reception is the first step in the processing of sensation and is dependent on the receptor type, stimulus, and receptive field.
  • For example, the shark, unlike most fish predators, is electrosensitive (i.e., sensitive to electrical fields produced by other animals in its environment).
  • The first step in sensation is reception: the activation of sensory receptors by stimuli such as mechanical stimuli (being bent or squished, for example), chemicals, or temperature.
  • The region in space in which a given sensory receptor can respond to a stimulus, be it far away or in contact with the body, is that receptor's receptive field.
  • Think for a moment about the differences in receptive fields for the different senses.

• Tactile Sensation

  • Furthermore, each has a different receptive field:

• Somatosensation: Pressure, Temperature, and Pain

  • These receptors differ in their field size (small or large) and their speeds of adaptation (fast or slow).
  • Thus, there are four types of mechanoreceptors based on the four possible combinations of fast vs. slow speed and large vs. small receptive fields.
  • The receptive field size refers to the amount of skin area that responds to the stimulus, with smaller areas specializing in locating stimuli accurately.

• Somatosensory Receptors

  • The receptive fields of Merkel's disks are small, with well-defined borders.
  • Pacinian corpuscles, such as these visualized using bright field light microscopy, detect pressure (touch) and high-frequency vibration.
  • Meissner corpuscles in the fingertips, such as the one viewed here using bright field light microscopy, allow for touch discrimination of fine detail.

• Transduction and Perception

  • Four aspects of sensory information are encoded by sensory systems: the type of stimulus, the location of the stimulus in the receptive field, the duration of the stimulus, and the relative intensity of the stimulus.

• Digital Surveys

  • However, the online research field remains relatively new and continues to evolve.

• Intended Context of Reception

  • Art's context of reception depends on a variety of circumstances, both on the part of the artist as well as the artistic community the artist is participating in.
  • Art's context of reception depends on a variety of circumstances, both on the part of the artist as well as the artistic community and climate that the artist is participating in.

• Vision: The Visual System, the Eye, and Color Vision

  • Visual reception occurs at the retina where photoreceptor cells called cones and rods give an image color and shadow.
  • The left hemisphere of the brain processes visual images from the right-hand side of space, or the right visual field, and the right hemisphere processes visual images from the left-hand side of space, or the left visual field.
  • This allows the visual cortex to receive the same visual field from both eyes.