1/1, 7:51 PM] Dr Ankala V Subbarao:
Medical Riddle of the day...…..Subject: PHYSIOLOGY....
[1/1, 8:28 PM] Rakesh Biswas:
Sympathetic nervous system
[1/2, 7:14 PM] Dr Ankala V Subbarao: Thank you for your response, Dr Rakesh Biswas...…. I was thinking of PRE OPTIC NUCLEI of HYPOTHALAMUS.. when composing the riddle..
[1/2, 8:06 PM] Rakesh Biswas:
Absolutely right!
The sympathetic nervous system output has been widely held to originate in the hypothalamus, more specifically, "a network of neurons connecting pre optic and dorsomedial nuclei aka hypothalamic visceromotor pattern generator (HVPG) with outputs to selective pools of autonomic neurons in all hypothalamic subdivisions (collectively considered as preautonomic cell groups).
The above nuclear outputs descend to the sympathetic nervous system through efferents to the brainstem reticular formation formed by the dorsal longitudinal fasciculus and periventricular system whose axons descend to the brainstem to innervate visceral motor, sensory and somatic and accessory spinal autonomic sympathetic and parasympathetic preganglionic neurons in the spinal cord."
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