Inferior parietal lobule
Updates to Article Attributes
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.
Gross anatomy
Relations
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.
Blood supply
Its chief blood supply is through the middle cerebral artery.
Related pathology
Damage to the dominant IPL may lead to impairment of speech repetition 2.
Practical points
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.
-<p>The <strong>inferior parietal lobule (IPL)</strong> is one of the three divisions of the <a href="/articles/parietal-lobe">parietal lobe</a>. It is composed of a <a href="/articles/supramarginal-gyrus-1">supramarginal gyrus</a> rostrally and an <a href="/articles/angular-gyrus">angular gyrus</a> caudally. It is involved with sensorimotor integration, spatial attention and visuomotor and auditory processing <sup>1</sup>.</p><h4>Gross anatomy</h4><h5>Relations</h5><p>The inferior parietal lobule is separated from the <a href="/articles/superior-parietal-lobule">superior parietal lobule</a> (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.</p><h4>Blood supply</h4><p>Its chief blood supply is through the <a href="/articles/middle-cerebral-artery">middle cerebral artery</a>.</p><h4>Related pathology</h4><p>Damage to the dominant IPL may lead to impairment of speech repetition <sup>2</sup>.</p><h4>Practical points</h4><p>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.</p>- +<p>The <strong>inferior parietal lobule (IPL)</strong> is one of the three divisions of the <a href="/articles/parietal-lobe">parietal lobe</a>. It is composed of a <a href="/articles/supramarginal-gyrus-1">supramarginal gyrus</a> rostrally and an <a href="/articles/angular-gyrus">angular gyrus</a> caudally. It is involved with sensorimotor integration, spatial attention and visuomotor and auditory processing <sup>1</sup>.</p><h4>Gross anatomy</h4><h5>Relations</h5><p>The inferior parietal lobule is separated from the <a href="/articles/superior-parietal-lobule">superior parietal lobule</a> (SPL) by the <a href="/articles/intraparietal-sulcus">intraparietal sulcus</a>. It is bounded by the <a href="/articles/postcentral-gyrus">post central sulcus</a> anteriorly, <a href="/articles/temporo-occipital-line">temporo-occipital line</a> laterally, <a href="/articles/parieto-occipital-fissure-1">parieto-occipital sulcus</a> posteriorly and intraparietal sulcus medially.</p><h4>Blood supply</h4><p>Its chief blood supply is through the <a href="/articles/middle-cerebral-artery">middle cerebral artery</a>.</p><h4>Related pathology</h4><p>Damage to the dominant IPL may lead to impairment of speech repetition <sup>2</sup>.</p><h4>Practical points</h4><p>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.</p>
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