The arachnoid mater (or simply arachnoid) is one of the three meninges, the protective membranes that cover the brain and spinal cord. It is so named because of its resemblance to a spider web. The arachnoid mater is a derivative of the neural crest mesoectoderm in the embryo.

2021年6月2日 · The arachnoid mater is the middle layer of the meninges, lying directly underneath the dura mater. It consists of layers of connective tissue, is avascular , and does not receive any innervation. Underneath the arachnoid is a space known as the sub-arachnoid space .

从外到内，脑膜大体分为硬脑膜（dura）, 蛛网膜 （arachnoid）和软脑膜（pia）。 这精细的三层脑膜，每一层都可以再拿显微镜细细剖析下去。 硬脑膜又可细分为两层，外层紧贴颅骨内侧，是颅骨的骨膜，硬脑膜依靠这层骨膜锚定在颅骨上。

2024年2月15日 · The arachnoid mater is the middle layer of the meninges enveloping the brain and spinal cord. It lies closely against the dura mater, however, it is not attached to it. The arachnoid mater is named for its spiderweb-like appearance and is a thin transparent membrane encasing the brain and spinal cord like a loosely fitting sac.

蛛網膜 或稱 蜘蛛膜 （英語： Arachnoid mater），是三種 腦膜 之一，為覆蓋 大腦 和 脊髓 的保護 膜。 蛛網膜基質是 胚胎 中 神經脊 中外胚層的衍生物。 蛛網膜位於 硬腦膜 下，動脈和靜脈在其上延伸。 脊柱硬腦膜打開，可見蛛網膜。 脊髓延髓及其膜。 脊髓。 脊膜和神經根深層解剖後視圖。 腦膜和淺表腦靜脈深層解剖。 Orlando Regional Healthcare, Education and Development. 2004. "Overview of Adult Traumatic Brain Injuries." Retrieved on 2008-01-16.

脑 brain 外包被硬脑膜 cerebral dura mater 、脑蛛网膜 cerebral arachnoid mater 和软脑膜 cerebral pia mater。 其中 脑蛛网膜与软脑膜之间的腔隙称为蛛网膜下隙 subarachnoid space ，内充脑脊液。

2023年11月3日 · Specifically, the CSF passes between the inner two meningeal layers (arachnoid and pia) which are together called the leptomeninges. This article will discuss the anatomy and function of the cranial and spinal meninges. The cranial dura mater is the outermost meningeal layer, consisting of dense irregular connective tissue.

2022年11月8日 · The arachnoid mater is a membrane that comes into direct contact with the dura mater and is separated from the pia mater by a CSF-filled space known as the subarachnoid space 1. The arachnoid mater loosely surrounds the entire brain and is easily separable from the dura except where it is adherent to the adventitia of the internal carotid and ...

The arachnoid mater is the second layer of the meninges, situated internally to the dura mater. It envelops the brain and spinal cord, forming a delicate and transparent membrane.

蛛网膜囊肿的症状包括头痛、呕心、癫痫以及视力障碍。 Because of this continuum, the layers are often referred to as the pia arachnoid or leptomeninges. Intracranial arachnoid cysts usually occur adjacent to the arachnoidal cistern. Stems and leaves are finely arachnoid-tomentose becoming glabrous and green with age.