Following removal of a mandibular third molar, a patient has…
Following removal of a mandibular third molar, a patient has reduced sensation over the lower lip and chin on the operated side. Jaw-closing strength is normal.a) Identify the peripheral nerve supplying sensation to the lower lip and chin, and name the trigeminal division from which it arises. (2)b) Trace the main route by which nociceptive impulses from a mandibular tooth reach the primary somatosensory cortex. Include the sensory ganglion, main brainstem relay, crossing and thalamic relay. (5)c) Explain why normal jaw-closing strength is compatible with the sensory deficit described. (1)
Read DetailsDuring a difficult dental procedure, a patient becomes anxio…
During a difficult dental procedure, a patient becomes anxious and develops tachycardia.a) Identify the predominant autonomic division responsible for the tachycardia and outline the two-neurone efferent pathway to the heart, including the principal neurotransmitters. (4)b) Explain how the hypothalamus and one cortical or limbic region contribute to the autonomic response to a stressful experience. (2)c) Describe one descending central nervous system mechanism that can reduce transmission of nociceptive information. (2)
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