Sensory (Afferent) Neurons
Sensory neurons are somatic afferent neurons that conduct impulses initiated in receptors in the skin, skeletal muscles, tendons, & joints. Receptors in the skin are responsible for sensing such things as touch, temperature, pressure, & pain and are called exteroceptors. Receptors in the skeletal muscles, tendons, & joints provide information about body position & movement and are called proprioceptors. Somatic afferent neurons are unipolar neurons that enter the spinal cord through the dorsal root & their cell bodies are located in the dorsal root ganglia.
- Cell body located in PNS
- Transmit electrical signals from tissues to CNS
- Sensory receptors detect changes in environment (stimuli) and relay information to controller (integrating center-CNS)
- Dendrites = sensory receptors