A client is assessed for sensory deficits. Which part of the nervous system is primarily responsible for carrying sensory information from the periphery to the central nervous system?

Choice A reason: Cranial nerve VII, the facial nerve, is primarily responsible for facial expressions, taste on the anterior two-thirds of the tongue, and lacrimation. While it has sensory and motor functions, it is not the primary nerve associated with the complex swallowing reflex mechanism, which involves the pharynx.

Choice B reason: Cranial nerve IX, the glossopharyngeal nerve, provides motor innervation to the stylopharyngeus muscle and sensory innervation to the pharynx, posterior one-third of the tongue, and tonsils. It is critical for the gag reflex and coordinating the muscular actions necessary for efficient, safe swallowing, making it the primary focus here.

Choice C reason: Cranial nerve V, the trigeminal nerve, handles motor function for muscles of mastication and sensory input from the face. While mastication is the initial stage of ingestion, dysphagia specifically related to the swallowing reflex is more directly mediated by the glossopharyngeal and vagus nerves.

Choice D reason: Cranial nerve I, the olfactory nerve, is exclusively sensory and is responsible for the sense of smell. It does not play any role in the motor function of the oropharyngeal muscles or the coordination of the swallowing reflex, thus it is irrelevant to the assessment of dysphagia.

Choice A reason: A complete bowel obstruction is a surgical emergency because it carries a high risk of bowel ischemia, necrosis, and subsequent perforation. Preparing the client for an urgent surgical intervention, such as a laparotomy or resection, is the definitive and necessary treatment to restore bowel patency and prevent sepsis.

Choice B reason: A high-fiber diet is strictly contraindicated in a patient with a known complete bowel obstruction. Increasing bulk in the intestinal lumen will exacerbate the physical blockage, intensify peristaltic pressure against the obstruction, and significantly increase the risk of bowel perforation, thereby worsening the patient’s clinical condition.

Choice C reason: Increasing oral or systemic fluid intake in a patient with a complete bowel obstruction can lead to dangerous fluid sequestration within the bowel lumen proximal to the site of obstruction. This increases intraluminal pressure, risks vomiting and aspiration, and does not resolve the underlying physical blockage of the bowel.

Choice D reason: Administering an enema is absolutely contraindicated in cases of a complete bowel obstruction. The introduction of fluid and pressure into the colon distal to the obstruction site could cause catastrophic perforation of the bowel, leading to peritonitis and a systemic inflammatory response, significantly endangering the client's life.