Extrinsic and Intrinsic Blood Supply to the Optic
ELINE SALAUD ,
EPHANE PLOTEAU ,
Laboratoire d’Anatomie, Facult
e de Nantes, 1, rue Gaston Veil, Nantes cedex,
Neurochirurgie neurotraumatologie, Centre Hospitalo Universitaire de Nantes, 1 place Alexis Ricordeau,
NANTES cedex 1, 44000, France
Inserm U791, LIOAD, Facult
e de Chirurgie Dentaire, 1 Place Alexis Ricordeau, Nantes Cedex 1, 44042,
Although there have been many studies of the arterial cerebral blood supply, only
seven have described the optic chiasm (OC) blood supply and their results are
contradictory. The aim of this study was to analyze the extrinsic and intrinsic OC
blood supply on cadaveric specimens using dissections and microcomputer
tomography (Micro-CT). Thirteen human specimens were dissected and the
internal or common carotid arteries were injected with red latex, China Ink with
gelatin or barium sulfate. Three Micro-CTs were obtained to reveal the intrinsic
blood supply to the OC. The superior hypophyseal arteries (SupHypA) (13/13)
and posterior communicating artery (PCoA) (12/13) supplied the pial network on
the inferior side of the OC. The ﬁrst segment of the anterior cerebral artery (ACA)
(10/10), SupHypA (7/10), the anterior communicating artery (ACoA) (9/10),
and PComA (1/10) supplied the pial network of its superior side. The intrinsic OC
blood supply was divided into three networks (two lateral and one central).
Capillaries entering the OC originated principally from the inferior pial network.
The lateral network capillaries had the same orientation as the visual lateral
pathways, but the central network was not correlated with the nasal ﬁbers cross-
ing into the OC. There was no anastomosis in the pial or intrinsic networks. Only
SupHypA, PCoA, ACoA, and ACA were involved in the OC blood supply. Because
there was no extrinsic or intrinsic anastomosis, all arteries should be preserved.
Tumor compression of the inferior intrinsic arterial network could contribute to
visual defects. Clin. Anat. 31:432–440, 2018.
2017 Wiley Periodicals, Inc.
Key words: arterial supply; superior hypophyseal artery; optic chiasm
Few articles have reported the pial blood supply to
the optic chiasm (OC) (Blunt and Steele, 1956; Col-
lette et al., 1956; Rhoton, 2002; Kidd, 2014), and
only three have reported the intrinsic arterial network
of the OC; but their results are discordant (Blunt and
Steele, 1956; Collette et al., 1956; Bergland, 1969).
Knowledge of the extrinsic and intrinsic arterial
blood supply to the OC is important because many
pathologies of the area can compress the OC. Studies
of the optic chiasm blood supply are needed to
elucidate the effects of OC compression and to pre-
serve this arterial pial network during surgery.
*Correspondence to: Dr. C
eline Salaud, Department of Human
Anatomy University of Nantes, 1, rue Gaston Veil, 44035 Nantes
cedex, France E-mail: firstname.lastname@example.org
Received 19 October 2017; Revised 3 December 2017;
Accepted 12 December 2017
Published online 27 December 2017 in Wiley Online Library
(wileyonlinelibrary.com). DOI: 10.1002/ca.23037
2017 Wiley Periodicals, Inc.
Clinical Anatomy 31:432–440 (2018)