The blood supply of the stapes is derived from which artery in most individuals?
- A Posterior tympanic branch of the stylomastoid artery
- B Obturator branch of the stylomastoid artery through the stapedial tendon ✓
- C Anterior tympanic branch of the maxillary artery
- D Persistent stapedial artery
Correct answer: B. Obturator branch of the stylomastoid artery through the stapedial tendon
Explanation
The stapes is supplied by the obturator branch of the stylomastoid artery (a branch of the posterior auricular artery), which enters through the stapedial tendon. This is relevant in stapedectomy surgery, as avulsion of the stapedial tendon or excessive manipulation risks devascularizing the stapes crura. The persistent stapedial artery is an embryological remnant that occasionally persists and can be a surgical hazard, but it is not the normal blood supply in adults.
Reference: Dhingra Diseases of Ear, Nose and Throat, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.