Cisterna cerebellomedullaris

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Liquor spaces on the brain stem . No. 3 marks the cerebellomedullary cistern , the arrow the entrance through the foramen magendii.

The Cisterna cerebellomedullaris (Syn. Cisterna magna ) is an extension of the subarachnoid space between the lower surface of the cerebellum (Cerrebellum) and the elongated medulla ( Medulla oblongata ). In humans it is about 3 cm wide and about 2 cm deep. In the central plane, the cistern can be narrowed by the falx cerebelli . It is connected to the fourth cerebral ventricle via the two foramina Luschkae and the foramen Magendii and contains cerebrospinal fluid ( liquor cerebrospinalis ).

This widening of the subarachnoid space can be punctured to collect cerebral fluid . In this procedure, known as suboccipital puncture , a needle is inserted into the cerebellomedullary cistern through the opening between the occiput and the atlas .

literature

  • Theodor H. Schiebler, Walter Schmidt: Anatomy: cytology, histology, history of development, macroscopic and microscopic human anatomy . 5th edition. Thieme, Stuttgart 2013, ISBN 978-3-662-05733-9 , p. 845 .