In the limbic circuit described by Papez, the mammillary body communicates with the anterior nuclear group of the thalamus through which fibre bundle?
- A Fornix
- B Mammillotegmental tract
- C Mammillothalamic tract ✓
- D Stria terminalis
Correct answer: C. Mammillothalamic tract
Explanation
The mammillothalamic tract (bundle of Vicq d'Azyr) links the mammillary body to the anterior thalamic nucleus, forming the third link in the Papez circuit: hippocampus to mammillary body via the fornix, then to the anterior thalamus, then to the cingulate gyrus via the thalamocingulate radiations. The mammillotegmental tract instead descends to the tegmentum of the midbrain and is not part of the circuit, which rules out option B.
Reference: Snell's Clinical Neuroanatomy, 8th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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