What is a sensory unit quizlet?
sensory unit? a single afferent neuron and all its receptor endings.
What is a 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.
How does the size of the receptive field influence sensitivity?
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.
What is the primary function of a sensory receptor?
A major role of sensory receptors is to help us learn about the environment around us, or about the state of our internal environment. Different types of stimuli from varying sources are received and changed into the electrochemical signals of the nervous system.
What are sensory receptors?
Sensory receptors are specialized epidermal cells that respond to environmental stimuli and consist of structural and support cells that produce the outward form of the receptor, and the internal neural dendrites that respond to specific stimuli.
What are the 12 cranial nerve?
The 12 Cranial Nerves
- I. Olfactory nerve.
- II. Optic nerve.
- III. Oculomotor nerve.
- IV. Trochlear nerve.
- V. Trigeminal nerve.
- VI. Abducens nerve.
- VII. Facial nerve.
- VIII. Vestibulocochlear nerve.
What is the afferent nerve?
nerves that carry signals toward the central nervous system from the periphery. Afferent may also be used generally to describe nerves that are traveling into a nervous system structure (i.e. input fibers for a particular area as opposed to output fibers).
What is sensory nerve damage?
Sensory nerve damage causes various symptoms because sensory nerves have a broad range of functions. Damage to large sensory fibers harms the ability to feel vibrations and touch, especially in the hands and feet.