Dictionary of Biological Psychology
These are FIBRES involved in the sensation of PAIN. A-delta (δ) fibres are small myelinated (see MYELIN) fibres; A-alpha (α) and A-beta (β) fibres are larger than delta and are also myelinated.
The delta fibres, like the unmyelinated C FIBRES, come from cell bodies in the DORSAL ROOT GANGLIA.They are UNIPOLAR NEURONS: the AXON takes information into layers 1 and 5 of the DORSAL HORN of the spinal cord (from where information is sent to the BRAINSTEM and THALAMUS). The DENDRITE brings information in from nociceptors. The A-alpha and A-beta fibres project to layer 4 of the dorsal horn and bring information in from MECHANORECEPTORS. For further information, see PAIN.
This is the complete article, containing 112 words
(approx. 1 page at 300 words per page).
View More Summaries on Axon
