Inferior parietal lobule

Dr Jeffrey Cheng and Dr Dayu Gai et al.

The inferior parietal lobule (IPL) is one of the three divisions of the parietal lobe. It is composed of a supramarginal gyrus rostrally and an angular gyrus caudally. It is involved with sensorimotor integration, spatial attention and visuomotor and auditory processing 1.

The inferior parietal lobule is separated from the superior parietal lobule (SPL) by the intraparietal sulcus. It is bounded by the post central sulcus anteriorly, temporo-occipital line laterally, parieto-occipital sulcus posteriorly and intraparietal sulcus medially.

Its chief blood supply is through the middle cerebral artery.

Damage to the dominant IPL may lead to impairment of speech repetition 2.

The posterior ascending ramus (of the Sylvian fissure) sign states that the Sylvian fissure extends into the anterior portion of the IPL. The gyrus which caps this fissure is the supramarginal gyrus.

Anatomy: Brain
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Article information

rID: 38712
Section: Anatomy
Synonyms or Alternate Spellings:
  • Inferior parietal lobule (IPL)

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Cases and figures

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    Figure 1: superior view of inferior parietal lobule
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