The posterior perforated substance is a layer of gray matter which is pierced by small apertures for the transmission of blood vessels. Its inferior part lies on the ventral aspect of the medial portions of the tegmenta and contains the interpeduncular nucleus; its superior part forms part of the floor of the third ventricle.[citation needed]
The PPS is situated between the two mesencephalic cerebral peduncles,[1]: 476 and posterior/caudal to the two mammillary bodies.[1]: 470 It is perforated by branches of the posterior cerebral arteries en route to the thalamus and basal ganglia.[1]: 473 The PPS forms part of the floor of the third ventricle,[1]: 469 and part of the roof of the interpeduncular cistern.[1]: 440
^ abcdeSinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). ISBN 978-0-7295-3752-0.
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The posteriorperforatedsubstance is a layer of gray matter which is pierced by small apertures for the transmission of blood vessels. Its inferior part...
The anterior perforatedsubstance is a part of the brain. It is bilateral. It is irregular and quadrilateral. It lies in front of the optic tract and behind...
commencement of the posterior cerebral artery: these, with similar branches from the posterior communicating, pierce the posteriorperforatedsubstance, and supply...
roof is represented by the floor of the third ventricle (i.e. posteriorperforatedsubstance, and the two mammillary bodies). Its floor is formed by the...
ipsilateral cerebral peduncle: 477 and adjacent to the anterior perforatedsubstance.: 471 The ipsilateral oculomotor nerve (CN III) passes inferolaterally...
interpeduncular fossa, from behind forward,[citation needed] are the posteriorperforatedsubstance, corpora mamillaria, tuber cinereum, infundibulum, and pituitary...
needed] This is a cholinergic bundle of nerve fibers posterior to the anterior perforatedsubstance. It interconnects the subcallosal gyrus in the septal...
point between anterior and posterior stem of the lateral sulcus. It is the lateral most limit of the anterior perforatedsubstance and the starting point...
the junction of the posterior division of the retromandibular vein with the posterior auricular vein. It commences in the substance of the parotid gland...
triangular area in front of the anterior perforatedsubstance. Its apex, directed forward, occupies the posterior part of the olfactory sulcus, and is brought...
perforatedsubstance at the medial extremity of the lateral cerebral fissure. Angiographically, this segment extends from the origin of the posterior...
artery (MCA). They are small perforating arteries, which enter the underside of the brain at the anterior perforatedsubstance to supply blood to part of...
the olfactory trigone. Caudal to these elements is the anterior perforatedsubstance, the anterior part of which is marked by the relief of the olfactory...
face, being formed by the junction of the posterior division of the retromandibular vein with the posterior auricular vein. Eye – The human eye is a sense...
deaths in 2015, down from 327,000 in 1990. The first description of a perforated peptic ulcer was in 1670, in Princess Henrietta of England. H. pylori...
systems, they were in the order of Opisthopora since the male pores opened posterior to the female pores, although the internal male segments are anterior...
nutrients and other substances from the food it consumes. Most of this food is ingested in the form of macromolecules and other complex substances (such as proteins...
no direct pathway between them. The thick septum of the heart is not perforated and does not have visible pores as some people thought or invisible pores...
articulates anteriorly (f) with the posterior end of the second axillary, and posteriorly (b) with the posterior wing process of the tergum (PNP), or...
abdomen and pelvis.[citation needed] It supplies the pia mater, and the substance of the medulla spinalis, also sending off branches at its lower part to...
turbinectomy can be performed. Perforated septum – The reconstruction of a saddle nose caused by a (collapsed) perforated septum, or by autoimmune problems...
The prostate produces and contains fluid that forms part of semen, the substance emitted during ejaculation as part of the male sexual response. This prostatic...
which terminates near the atrial siphon. The walls of the pharynx are perforated by several bands of slits, known as stigmata, through which water escapes...
carcinoma and basal-cell carcinomas. Middle ear The ear drum may become perforated in the event of a large sound or explosion, when diving or flying (called...
among these basal lineages, with later lineages showing more complex perforated scales. With the evolution of the Ditrysia in the mid-Cretaceous, there...
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