The spiral ligament of the cochlea is located on which wall of the scala media and houses which critical structure for endolymph production?
- A Medial wall; stria vascularis
- B Basilar membrane; Reissner's membrane
- C Lateral wall; stria vascularis ✓
- D Lateral wall; organ of Corti
Correct answer: C. Lateral wall; stria vascularis
Explanation
The spiral ligament lies on the lateral wall of the scala media (cochlear duct). It bears the stria vascularis, the metabolically active epithelium responsible for endolymph secretion and maintenance of the +80 mV endocochlear potential. The organ of Corti sits on the basilar membrane (floor), while Reissner's membrane forms the roof.
Reference: Dhingra Diseases of Ear, Nose and Throat, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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