PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Thalamus
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Medulla oblongata
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Spinal cord
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None of the above
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Detailed explanation-1: -The sneezing reflex may be divided in two phases. The first is a nasal or sensitive phase, following stimulation of the nasal mucosa by chemical or physical irritants. The afferent pathways are through the olfactory and ethmoidal nerves, which converge in the putative “sneezing centre” in the medulla.
Detailed explanation-2: -The signals travel to the ‘sneezing centre’ in the lateral medulla of your brain. When they reach a critical threshold, it triggers a sneeze reflex. The reflex forces a sudden, deep intake of breath. At this point the chain reaction is unstoppable and a sneeze is inevitable.
Detailed explanation-3: -The medulla oblongata contains cardiac, respiratory, vomiting, and vasomotor centers. It deals with the autonomic functions of breathing, heart rate, blood pressure, and sleep-wake cycle.