Spinal Reflexes || Unconventional Senses and Sensory Attributes
❯ ❯ Spinal Reflexes
Also not considered among the traditional senses, reflexes are important and effective components of sensory stimulus-reaction complexes. Reflexes are involuntary or unintentional (uncontrolled). Each type of reflex response is initiated by sensory stimuli relayed from any of the other major senses. Most importantly, the stimulus itself excites specialized sensory receptors that respond unambiguously to a certain type, quality, or intensity of stimulation.
Interestingly, reflexive actions receive their signals from the spinal cord. This makes them considerably faster than one's normal reactions because they bypass the traditional neural pathway (the brain). Not to say the brain is uninvolved. The brain continuously builds, adapts, and influences spinal circuitry, in both short- and long-term development, and many spinal reflexes operate simultaneously as a result. An overview of the main types of spinal reflexes will include: stretch reflex (muscle contraction), crossed-extensor reflex (opposite limb compensating for loss of support), withdrawal reflex (nociceptive reflex, protecting the body from pain), and autogenic inhibition reflex (negative feedback mechanism to control muscle tension).
"The spinal cord is the simplest and most technically accessible part of the mammalian [central nervous system]. Thus, spinal cord reflexes, the brain's influence over them, and the spinal cord plasticity this influence produces provide the basis of a powerful experimental protocol for studying the mechanisms and substrates of learning." (Encyclopedia of Neuroscience)
❯ ❯ Adapted from a senses-writing masterpost: 15 Unconventional Senses and Sensory Attributes
