Structures related to the medial aspect of the hyoglossus muscle include all of the following EXCEPT_______________?
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Answer: D. Hypoglossal nerve
Explanation
The hypoglossal nerve runs superficial or lateral to the hyoglossus muscle rather than medial to it. This spatial relationship serves as an important anatomical landmark during submandibular and neck dissections. Structures located medial to the hyoglossus muscle include the lingual artery and glossopharyngeal nerve. The hyoglossus is a quadrilateral muscle of the tongue that depresses and flattens the tongue. Deep structures passing medial to the muscle include important blood vessels and nerves supplying the oral cavity. Superficial structures crossing the lateral surface include the hypoglossal nerve and mylohyoid muscle.
Surgeons performing procedures on the floor of the mouth must identify these fascial and muscular relations. Mistaking the nerve position during surgery can lead to accidental injury and subsequent tongue paralysis. Anatomical anomalies in this region can complicate vascular access for head and neck procedures. The glossopharyngeal nerve passes deep and medial to the hyoglossus muscle during its course. The stylohyoid ligament is situated along the medial aspect of the hyoglossus muscle structure. The lingual artery runs deep to the hyoglossus muscle to supply blood to the tongue.
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