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Cerebral Blood Supply Development

Embryonic stage

4-5 mm - the hindbrain (i.e., future posterior fossa) is supplied by two parallel neural arteries (or channels). These arteries obtain their blood supply from carotid-vertebrobasilar anastomoses given by the trigeminal artery (TA), the otic artery (OA), the hypoglossal artery (HA), and the proatlantal artery (ProA)
5-8 mm - the basilar artery (BA) forms from the consolidation of the neural arteries.
7-12 mm - the vertebral arteries (VA) forms from transverse anastomoses between cervical intersegmental arteries, beginning with the ProA and proceeding downward to the 6th intersegmental artery,
11-12 mm - (35 days) the development of the MCA is first identified as small buds originating proximal to the ACA on the anterior division of the primitive ICA.
16-18 mm - the MCA becomes more prominent, the plexi fuse into a single artery and further branches pierce the cerebral hemisphere.
18 mm - the stem of the ACA gives rise to the olfactory artery.
21-24 mm - formation of the anterior communicating artery (ACOMM).

A - In early phases of development the posterior circulation relies almost entirely from blood supply coming from the anterior circulation through carotid-vertebrobasilar anastomoses.
B and C - As the posterior fossa structures and the occipital lobe grow, the posterior circulation becomes progressively independent from the anterior circulation with obliteration of the anterior-posterior anastomoses from caudal to rostral maintaining in the majority of adult only one connection between the distal basilar arteries with the carotid artery via the posterior communicating artery.

(above text modified from reference)

Links: Neural System Development | Cardiovascular System Development | Head Development

Reference

<pubmed>26060802</pubmed>| J Stroke.

Copyright

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Figure 2. http://synapse.koreamed.org/ViewImage.php?Type=F&aid=497461&id=F2&afn=1183_JOS_17_2_144&fn=jos-17-144-g002_1183JOS

Jos-17-144-g002-l.jpg

Cite this page: Hill, M.A. (2026, October 5) Embryology Cerebral blood supply development 01.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Cerebral_blood_supply_development_01.jpg

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current	13:24, 15 Haziran 2015		1,200 × 460 (67 KB)	Z8600021 (talk \| contribs)	==Cerebral Blood Supply Development== At the 4-5-mm embryonic stage, the hindbrain (i.e., future posterior fossa) is supplied by two parallel neural arteries (or channels). These arteries obtain their blood supply from carotid-vertebrobasilar anastomo...

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 Embryonic stage
-* 4-5 mm  - the hindbrain (i.e., future posterior fossa) is supplied by two parallel neural arteries (or channels). These arteries obtain their blood supply from carotid-vertebrobasilar anastomoses given by the trigeminal artery (TA), the otic artery (OA), the hypoglossal artery (HA), and the proatlantal artery (ProA)
+* [[Carnegie stage 13|4-5 mm]]  - the hindbrain (i.e., future posterior fossa) is supplied by two parallel neural arteries (or channels). These arteries obtain their blood supply from carotid-vertebrobasilar anastomoses given by the trigeminal artery (TA), the otic artery (OA), the hypoglossal artery (HA), and the proatlantal artery (ProA)
-* 5-8 mm - the basilar artery (BA) forms from the consolidation of the neural arteries.
+* [[Carnegie stage 14|5-8 mm]] - the basilar artery (BA) forms from the consolidation of the neural arteries.
-* 7-12 mm - the vertebral arteries (VA) forms from transverse anastomoses between cervical intersegmental arteries, beginning with the ProA and proceeding downward to the 6th intersegmental artery,
+* [[Carnegie stage 15|7-12 mm]] - the vertebral arteries (VA) forms from transverse anastomoses between cervical intersegmental arteries, beginning with the ProA and proceeding downward to the 6th intersegmental artery,
-* 11-12 mm - (35 days) the development of the MCA is first identified as small buds originating proximal to the ACA on the anterior division of the primitive ICA.
+* [[Carnegie stage 16|11-12 mm]] - (35 days) the development of the MCA is first identified as small buds originating proximal to the ACA on the anterior division of the primitive ICA.
-* 16-18 mm - the MCA becomes more prominent, the plexi fuse into a single artery and further branches pierce the cerebral hemisphere.
+* [[Carnegie stage 19|16-18 mm]] - the MCA becomes more prominent, the plexi fuse into a single artery and further branches pierce the cerebral hemisphere.
 * 18 mm - the stem of the ACA gives rise to the olfactory artery.
-* 21-24 mm - formation of the anterior communicating artery (ACOMM).
+* [[Carnegie stage 21|21-24 mm]] - formation of the anterior communicating artery (ACOMM).
 |
 * '''A''' -  In early phases of development the posterior circulation relies almost entirely from blood supply coming from the anterior circulation through carotid-vertebrobasilar anastomoses.