Rahul Sharma (Editor)

Paracentral lobule

Updated on
Edit
Like
Comment
Share on FacebookTweet on TwitterShare on LinkedInShare on Reddit
Latin
  
lobulus paracentralis

Dorlands /Elsevier
  
l_13/12500890

FMA
  
77534

NeuroNames
  
ancil-404

TA
  
A14.1.09.209

Paracentral lobule

Paracentral lobule is on the medial surface of the hemisphere and is the continuation of the precentral and postcentral gyri. The paracentral lobule controls motor and sensory innervations of the contralateral lower extremity. It is also responsible for control of defecation and urination.

Contents

It includes portions of the frontal and parietal lobes:

  • The anterior portion of the paracentral lobule is part of the frontal lobe and is often referred to as the supplementary motor area.
  • The posterior portion is considered part of the parietal lobe and deals with somatosensory of the distal limbs.

    • While the boundary between the lobes, the central sulcus, is easy to locate on the lateral surface of the cerebral hemispheres, this boundary is often discerned in a cytoarchetectonic manner in cases where the central sulcus is not visible on the medial surface.

    Function

    Neurons in paracentral lobule are concerned with:

    1. Motor and sensory innervations of the contralateral lower extremity
    2. Regulation of physiological function such as defecation and micturition

    Blood supply

    It is supplied by branches of the anterior cerebral artery.

    Applied anatomy

    Damage of paracentral lobule occurs from occlusion of anterior cerebral artery. Characteristic manifestations include:

  • Contralateral lower limb muscle weakness
  • Urinary incontinence

    • References

    Paracentral lobule Wikipedia
    (Text) CC BY-SA