Related Experiment Video
Updated: Feb 10, 2026

Author Spotlight: Double Posteromedial Approach for Treating Posterior Cruciate Ligament Cysts
Published on: October 20, 2023
Abstract:
Arachnoid cysts of the middle cranial fossa may present clinically in several different ways. They may remain asymptomatic throughout life, or may cause only local bulging of the skull, with or without exophthalmos. Expansion of the cyst may occur through a ball-valve mechanism of its membrane in communication with the general subarachnoid space leading to increased intracranial pressure with or without localizing neurological deficits. Finally, such cysts are associated with increased vulnerability to the effects of head injury, resulting in hemorrhage either into the cyst or external to the cyst to form a subdural hematoma. Recognition of these various manifestations is essential to proper treatment.
More Related Videos
Related Concept Videos
Cranial Nerves: Overview and Anatomy
Cranial and Spinal Meninges
Cranial Meninges
These meningeal layers cover the cranium. The dura mater is the outermost layer of cranial meninges. It is a thick and durable membrane of dense...
Cranial Nerves: Types Part I
Olfactory Nerve (Cranial Nerve I)
The olfactory nerve, or cranial nerve I, is unique as it is purely sensory and dedicated to the sense of smell. This nerve originates in the olfactory epithelium of the...
Cranial Nerves: Types Part II
Facial Nerve (Cranial Nerve VII)
Cranial nerve VII, or the facial nerve,...
Cranial Part of Parasympathetic Division
The vagus nerve (cranial nerve X) alone accounts for approximately 75...
Cranial Bones: Lateral View
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...

