Dermo Neuro Modulating: Manual Treatment for Peripheral Nerves and Especially Cutaneous Nerves by Diane Jacobs

Author:Diane Jacobs [Jacobs, Diane]
Language: eng
Format: epub
ISBN: 9781987985184
Amazon: 1987985184
Publisher: Diane Jacobs
Published: 2016-11-24T21:00:00+00:00

GENERAL FEATURES OF SENSORY INPUT

NOTES: Mostly from C.U.M. Smith’s Biology of Sensory Systems, chapter 3 (2008).

All sensory neurons are classified into mechano-, chemo-, photo-, thermo-. They require adequate stimulus – defined as type of stimulus to which a receptor is attuned.All somatosensory neurons have cell bodies in the dorsal root ganglia (or their equivalent within the brain).

They all have a terminal pole somewhere in the periphery and a central pole somewhere inside the central nervous system. They do not have dendrites.

They are classified into mechano-, chemo-, photo-, thermo-

They are either exteroceptive or interoceptive:

Monitoring of external environment is important to all living creatures

Monitoring of the internal environment is important to brains which must manage thermal homeostasis endogenously

They can be of several sizes, from slowly conducting, unmyelinated thin C to fast-conducting, thickly myelinated large A beta type.

Nociceptive-capable neurons have a high threshold compared to the rest; they can conduct information that is modality specific or can be poly-modal or wide-dynamic. A subsection of nociceptive capable neurons are thicker, faster and myelinated, the A delta fibres. Most only reach into the CNS as far as the dorsal horn.

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