Medulla oblongata is supplied by the following aeries, EXCEPT?
**Core Concept**
The medulla oblongata, the lowest part of the brainstem, receives its blood supply from branches of the vertebrobasilar system, which is crucial for maintaining the vital functions of the body, including respiration, heart rate, and blood pressure.
**Why the Correct Answer is Right**
The medulla oblongata is primarily supplied by the anterior spinal artery, the anterior inferior cerebellar artery (AICA), the posterior inferior cerebellar artery (PICA), and the vertebral artery's branches, including the posterior inferior cerebellar artery (PICA) and the superior cerebellar artery's branches via the basilar artery. The basilar artery is formed by the fusion of the two vertebral arteries, which then gives rise to the pontine and superior cerebellar arteries. The anterior spinal artery, a branch of the vertebral arteries, supplies the anterior two-thirds of the spinal cord and the medulla oblongata.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided, so we cannot assess its correctness.
**Option B:** This option is not provided, so we cannot assess its correctness.
**Option C:** This option is not provided, so we cannot assess its correctness.
**Option D:** This option is not provided, so we cannot assess its correctness.
**Clinical Pearl / High-Yield Fact**
The medulla oblongata's blood supply is critical for maintaining its function, and damage to these arteries can result in devastating neurological deficits, including respiratory failure, cardiac arrest, and loss of consciousness.
**Correct Answer:** .