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The ciliospinal reflex (pupillary-skin reflex) consists of dilation of the ipsilateral pupil in response to pain applied to the neck, face, and upper trunk. If the right side of the neck is subjected to a painful stimulus, the right pupil dilates (increases in size 1-2mm from baseline).
The ciliospinal center (also known as Budge's center [1]) is a cluster of [citation needed] pre-ganglionic sympathetic neuron cell bodies located in the intermediolateral cell column (of the cornu laterale) at spinal cord segment (C8: Anatomic variation) T1-T2 [2]
In biology, a reflex, or reflex action, is an involuntary, unplanned sequence or action [1] and nearly instantaneous response to a stimulus. [2] [3] The simplest reflex is initiated by a stimulus, which activates an afferent nerve. The signal is then passed to a response neuron, which generates a response.
One reason why this effect is so strong may be that Attwell et al., (2001) trained animals for only 4 days at an ISI that is outside of a range known to be optimal for learning [150–300 ms is an optimal CS-US interval and the magnitude of learning decreases as the ISI is increased (Schneiderman and Gormezano, 1964; Smith, Coleman, and ...
Hanger reflex - reflex of unclear purpose that causes the head to rotate to the right when the top sides of the head are under pressure, named because it can be easily activated with a coat hanger; Hering–Breuer reflex — is a reflex triggered to prevent over-inflation of the lung
Sensitization is a non-associative learning process in which repeated administration of a stimulus results in the progressive amplification of a response. [1] Sensitization often is characterized by an enhancement of response to a whole class of stimuli in addition to the one that is repeated.
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Adie syndrome is a fairly common, benign, idiopathic neuropathy that selectively affects the ciliary ganglion and the spinal cord neurons involved in deep tendon reflex arcs. It usually develops in middle age, although it can occur in children. A variant of Adie syndrome, Ross syndrome, affects sweating as well.