The nurse asks for the patient to stick out their tongue. The tongue protrudes midline. What does this finding indicate?
Loss of function CN XII
Intact CN XII
Loss of function of CN IX
Intact CN IX
The Correct Answer is B
Tongue movement is primarily controlled by cranial nerve XII (hypoglossal nerve), which innervates intrinsic and extrinsic tongue muscles responsible for articulation, swallowing, and midline protrusion. Proper function reflects intact motor innervation without unilateral weakness or deviation.
Rationale:
A. Loss of CN XII function results in tongue deviation toward the affected side due to unopposed action of the contralateral genioglossus muscle. Atrophy, fasciculations, and impaired articulation may also be present. A midline protrusion would not be expected in dysfunction.
B. Intact CN XII is indicated by a tongue that protrudes straight midline without deviation. This reflects normal hypoglossal nerve motor function and balanced muscular activity of both sides of the tongue during voluntary movement.
C. CN IX (glossopharyngeal nerve) is primarily responsible for taste sensation in the posterior one-third of the tongue and swallowing reflexes. It does not control tongue protrusion, so its dysfunction would not affect midline movement.
D. Intact CN IX relates to normal gag reflex and posterior tongue sensation but does not influence tongue motor control. Midline protrusion is not dependent on glossopharyngeal nerve integrity, making this option incorrect.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Nasal septal perforation involves a full-thickness defect of the cartilaginous or bony septum, disrupting the mucoperichondrium. Ischemia leads to tissue necrosis, often resulting in whistling sounds during respiration, epistaxis, and crusting due to altered airflow dynamics and mucosal desiccation within the nasal vault.
Rationale:
A. Nasal polyps are benign, inflammatory outgrowths of the sinonasal mucosa often linked to chronic rhinosinusitis or asthma. They present as edematous masses rather than structural defects or holes. These lesions typically cause nasal obstruction and anosmia instead of septal tissue loss.
B. An aphthous ulcer, or canker sore, is a painful, shallow lesion occurring on the unattached oral mucosa. It is an ulcerative condition of the mouth, not the nasal cavity. While painful, it does not involve the cartilaginous destruction associated with the specified risk factors.
C. Chronic vasoconstriction from cocaine use causes localized ischemia, while digital trauma and infection erode the tissue. This results in a perforated defect that allows communication between the nasal passages. The loss of vascular integrity is the primary mechanism behind this specific structural abnormality.
D. Kaposi's sarcoma is a vascular neoplasm associated with Human Herpesvirus-8, appearing as violaceous cutaneous or mucosal lesions. It manifests as malignant nodules rather than a physical hole in the septum. This condition is most prevalent in immunocompromised individuals, particularly those with advanced HIV.
Correct Answer is ["A","D","E"]
Explanation
Hyperthyroidism is endocrine disorder characterized by excessive thyroid hormone secretion (T3, T4) from Graves disease, toxic multinodular goiter or thyroiditis causing hypermetabolic state with weight loss, tachycardia, heat intolerance, diarrhea.
Rationale:
A. Diarrhea reflects increased gastrointestinal motility in thyrotoxicosis state often present. Excess thyroid hormones accelerate intestinal transit via sympathetic stimulation effects. Common in Graves disease and toxic nodular goiter patients seen. Leads to fluid loss, dehydration, and electrolyte imbalance clinically observed.
B. Constipation indicates reduced gastrointestinal motility typical of hypothyroidism state presentation. Decreased thyroid hormones slow intestinal peristalsis causing stool retention clinically. Opposite of hyperthyroidism which increases bowel frequency and motility signs. Not consistent with thyrotoxicosis therefore incorrect diagnostic indicator finding present.
C. Bradycardia reflects slowed heart rate seen in hypothyroidism cases commonly. Hyperthyroidism typically causes tachycardia due to increased metabolic demand state. Excess thyroid hormones enhance beta adrenergic receptor sensitivity clinically observed. Therefore bradycardia contradicts expected sympathetic overactivity findings in hyperthyroidism state present here.
D. Unintentional weight loss results from increased basal metabolic rate state. Thyroid hormones increase lipolysis and protein catabolism significantly clinically evident. Seen in Graves disease and toxic nodular hyperthyroidism conditions present. Patients often exhibit weight loss despite increased appetite intake state.
E. Heat intolerance occurs due to hypermetabolic state and thermogenesis increase. Excess thyroid hormones increase oxygen consumption and heat production levels. Patients experience sweating, warm skin, and heat sensitivity frequently seen. Classic finding in hyperthyroidism distinguishing from hypothyroid cold intolerance state.
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