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Anterior temporal artery anatomy

The anterior temporal artery is a key distal branch of the middle cerebral artery (MCA) that supplies blood to the anterior portion of the temporal lobe. It plays a crucial role in the vascularization of the temporal pole, an area involved in language, memory, and emotional processing. Knowledge of its anatomy is important for neurosurgeons, neurologists, and radiologists, especially in the context of cerebrovascular diseases such as ischemic stroke, arteriovenous malformations, and aneurysms. The artery's appearance and identification on imaging modalities such as MRI and CT angiography are vital for preoperative planning and accurate diagnosis.

Synonyms

  • Polar temporal artery

  • Anterior temporal branch of the middle cerebral artery

  • Temporal polar artery

Origin and Course

  • Origin:
    The anterior temporal artery typically arises from the M1 or proximal M2 segment of the middle cerebral artery. Its origin is usually near the bifurcation or trifurcation point of the MCA.

  • Course:
    After originating from the MCA, the artery travels anteriorly and laterally, coursing over the superior aspect of the temporal pole. It supplies the anterior part of the temporal lobe, particularly the temporal pole cortex. The artery can occasionally branch into smaller vessels that anastomose with branches from the posterior cerebral artery or other temporal branches of the MCA.

Function

The anterior temporal artery supplies arterial blood to the anterior portion of the temporal lobe (temporal pole). This region is associated with:

  • Semantic memory

  • Emotional processing

  • Language comprehension

  • Integration of sensory input

Disruption of its blood supply can lead to deficits in these cognitive and sensory functions.

MRI Appearance

T1-weighted images:

  • ATA appears as a thin flow void (dark lumen) running along the temporal pole

  • Surrounded by intermediate signal temporal cortex

T2-weighted images:

  • Vessel lumen shows hypointense signal void

  • Temporal lobe infarcts in ATA territory appear hyperintense

FLAIR:

  • Vessel not directly visualized; ischemia in ATA territory shows cortical/subcortical hyperintensity

  • Chronic ischemic changes appear as gliotic hyperintensity in the anterior temporal lobe

T1 Post-Gadolinium:

  • Normal ATA enhances brightly and homogeneously

  • Abnormal focal enhancement may indicate vascular malformation, aneurysm, or vasculitis

MRA (Magnetic Resonance Angiography):

  • Flow-related enhancement shows ATA as a bright, fine vascular signal from proximal MCA toward temporal pole

  • Demonstrates stenosis, occlusion, or anomalous branching

  • Useful for mapping ATA in epilepsy surgery and stroke evaluation

CTA (CT Angiography):

  • ATA visualized as a high-attenuation vessel arising from MCA, coursing toward the temporal pole

  • 3D CTA reconstructions show its course and collateral anastomoses

  • Detects ischemia, aneurysms, vascular malformations, and collateral pathways

MRI images

Anterior temporal artery MRI 3T sagittal image