Neuron Classification Sensory Neurons

Receptor categories

Exteroreceptors, proprioreceptors, interoceptors

structural classification of neurons: Anaxonic

Found in CNS special sense organs, function not understood, undifferentiated axons to dendrites

Functional Classification of Neurons: Sensory Neurons ( Almost all sensory neurons are pseudounipolar neurons. located outside CNS. in peripheral sensory ganglia. )

form afferent division of the PNS. function: deliver information to the CNS. Collect information concerning external or internal environment.

structural classification of neurons: Pseudounipolar neurons

have continuous axons and dendritic and axonal processes. cell body lies off to one side. initial segment lies below dendrite branches. rest of structure classified as an axon. ex sensory neurons of PNS and may be myelinated

data from which receptor is carried by visceral?

interoreceptors

structural classification of neurons: Bipolar Neurons

number of fine dendrites fused to form a single dendrite. cell body lies between fused dendrite and single axon. rare but play important role in sensory info (sight, smell, hearing) axons are not myelinated

Visceral sensory neurons

transmit information about internal conditions and the status of organ systems.

Somatic sensory neurons

transmit information about the outside world and our position within it.

Afferent fibers

axons of a sensory neuron. extend between a sensory receptor and the spinal cord or brain.

Interoreceptors function

monitor digestive, respiratory, cardiovascular, urinary, reproductive systems and provide sensations of deep pressure, pain, taste

Proprioceptors function

monitor position and movement of skeletal muscles and joint.

structural classification of neurons: Multipolar Neurons

most common type of neuron. myelinated, control skeletal muscle. several dendrites, one axon with possible multiple branching.

data from which receptors are carried by somatic?

proprioceptors, exteroreceptors

Exteroreceptors function

provided information about external environment in the form of touch, temp, and pressure sensations, sight, smell, hearing