Subarachnoid Space

The subarachnoid space is the space that lies between the dura mater and the arachnoid membrane of the brain and spinal cord. This space is an important anatomical formation that plays an important role in the functioning of the nervous system. In this article we will look at the main characteristics of the subarachnoid space, its functions and possible diseases associated with it.

Anatomy of the subarachnoid space

The subarachnoid space is a narrow space between the arachnoid and dura mater. It is cylindrical in shape and is located at the back of the skull and in the neck area. The size and shape of the subarachnoid space may vary depending on the age and gender of the person.

Functions of the subarachnoid space:

1. Protection of the brain and spinal cord: The subarachnoid space protects the brain and spinal cord from mechanical damage and infections.
2. Providing circulation of cerebrospinal fluid: The subarachnoid space serves to circulate cerebrospinal fluid, which provides nutrition and protection to the brain and spinal cord.
3. Regulation of Brain Temperature: The subarachnoid space also plays a role in the regulation of brain temperature, as it serves to remove heat from the brain and spinal cord and transfer it to the environment.
4. Participation in metabolic processes: The subarachnoid space is involved in metabolic processes that occur in the nervous system.

Diseases associated with the subarachnoid space:

In some cases, the subarachnoid space may be increased or decreased in size. This can lead to various diseases such as hydrocephalus (enlarged subarachnoid space) and arachnoiditis (decreased subarachnoid space).

Hydrocephalus is a condition in which cerebrospinal fluid accumulates in the subarachnoid space, causing its volume to increase. This may cause headache, dizziness, blurred vision and other symptoms.

The subarachnoid space (abdominopelvic cavity) or subperitoneal space is the space between the inner surface of the peritoneum and the fascia covering it. Located in the space between the rectus abdominis muscles and the transverse fascia, as well as between the round and internal oblique muscles on their outer side. The boundaries of the cavity: above - the white line, below the navel - the genital fissure, laterally - the inguinal space, medially - the intraperitoneal fascia. There are also gaps in front and behind the edges of the rectus muscle belly. The bottom of the subperitoneal cavity is formed by a transverse fascial plate, from which, going backward, descending over the crest of the muscle root and reaching the anterior superior iliac spine, the transverse umbilical fascia descends, then overgrown with the aponeurosis of the external oblique muscle and forming the anterior wall. In the pelvic region, they merge to form the pelvic floor, forming its hernial sac