What are the two kinds of receptors in the retina?
Two types of photoreceptors reside in the retina: cones and rods. The cones are responsible for daytime vision, while the rods respond under dark conditions.
What is the Law of Specific Nerve Energies quizlet?
The law of specific nerve energies states that: every stimulation of the optic nerve is perceived as light. In what order does visual information pass through the retina? receptor cells, bipolar cells, ganglion cells.
What does the law of specific nerve energies state?
Johannes Müller’s law of specific nerve energies (LOSNE) states that the mind has access not to objects in the world but only to our nerves. This law implies that the contents of the mind have no qualities in common with environmental objects but serve only as arbitrary signs or markers of those objects.
What cells make up the retina?
There are five types of neurons in the retina: photoreceptors, bipolar cells, ganglion cells, horizontal cells, and amacrine cells.
What is a sensory unit?
A sensory unit is defined as a single nerve axon and all the sensory receptors which transmit information to it. For visual sensation the receptive field of a sensory unit is the solid angle monitored by the receptors linked to the nerve axon of the unit.
Which best describes the process of adaptation in sensory receptors?
Which best describes the process of “adaptation” in sensory receptors? A decrease in receptor sensitivity despite continuation of a stimulus. Polymodal neurons are: They integrate multiple types of sensory information and are responsible for complex processing of sensory information.
What is the afferent neuron?
Afferent neurons collect data from the various sensory receptors distributed throughout the body and transport this information to the spinal cord and brainstem (sensory cranial nerves) for initial interpretation and distribution to CNS centers and structures that use sensory information in the performance of their …
How is stimulus intensity coded for by sensory neurons?
Stimulus intensity is encoded in two ways: 1) frequency coding, where the firing rate of sensory neurons increases with increased intensity and 2) population coding, where the number of primary afferents responding increases (also called RECRUITMENT).
What is intensity of stimulus?
Threshold: the minimum intensity of a stimulus that is required to produce a response from a sensory system. can be defined in terms of: receptor threshold. action potential threshold.
What is the difference between stimulus frequency and intensity?
What is the difference b/w stimulus intensity & stimulus frequency? Stimulus intensity describes the amount of force generated to administer the stimulus. The more force that is used will increase the stimulus intensity. Stimulus frequency refers to the rate of delivered stimulus to the muscle.
How does the brain perceive the intensity of a stimulus?
The brain distinguishes sensory stimuli through a sensory pathway: action potentials from sensory receptors travel along neurons that are dedicated to a particular stimulus.
Where does perception occur in the brain?
occipital lobes
How do action potentials change in response to stimulus intensity?
When the intensity of the stimulus is increased, the size of the action potential does not become larger. Similarly, for the motor system, the greater the number of action potentials in a motor neuron, the greater the intensity of the contraction of a muscle that is innervated by that motor neuron.