Plexal point

The plexal point is the point at which the anterior choroidal artery enters into the lateral ventricle of the brain at the choroidal fissure.[1] The choroidal fissure, in this sense, is the narrow cleft along the medial wall of the lateral ventricle, where the choroid plexus is attached at the margins.[2][3] Not to be confused with the choroidal fissure of the eye.

On lateral angiograms, the plexal point is seen to be 18–26 mm from the origin of the anterior choroidal artery. It is an important angiographic landmark, characterized by a steep downward progression of a few millimeters, then a sharp posterior turn to mark the point of entry.[4]

References

  1. ↑ Baskaya, Mustafa K.; Coscarella, Ernesto; Gomez, Ferdinand; Morcos, Jacques J. (2004). "Surgical and angiographic anatomy of the posterior communicating and anterior choroidal arteries". Neuroanatomy. 3: 38–42.
  2. ↑ Sherman JL, Camponovo E, Citrin CM (Nov 1990). "MR imaging of CSF-like choroidal fissure and parenchymal cysts of the brain.". AJR Am J Roentgenol. 155 (5): 1069–75. doi:10.2214/ajr.155.5.2120937. PMID 2120937.
  3. ↑ "choroidal fissure". mondofacto - medical dictionary. 5 Mar 2000. Retrieved May 19, 2012.
  4. ↑ Wiesmanna, Martin; Yousrya, Indra; Seelosa, Klaus C. & Yousrya, Tarek A. (2001). "Identification and Anatomic Description of the Anterior Choroidal Artery by Use of 3D-TOF Source and 3D-CISS MR Imaging". AJNR. 22 (2): 305–310. PMID 11156774.


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