fourth ventricle
The fourth ventricle is one of the components of the ventricular system in the brain, along with the lateral and third ventricles. It extends from the cerebral aqueduct (of Sylvius) rostrally to the obex caudally and is filled with CSF.
CSF enters the ventricle via the cerebral aqueduct and leaves via one of four routes:
- via the obex and into the central canal
- via the median aperture (of Magendie) into the cisterna magna
- via one of the two lateral apertures (of Luschka) into the cerebellopontine cistern
It is characteristically diamond-shaped in sagittal cross-section and located dorsal to the pons or upper part of the medulla oblongata. The roof, located dorsally is formed by the superior medullary velum and inferior medullary velum overlying the cerebellum. The floor, located ventrally, is formed by the rhomboid fossa, a diamond-shaped depression on the dorsal surface of the pons and upper half of the medulla. The sidewalls are formed by the vela and cerebellar peduncles. It is widest at the level of the pontomedullary junction. The obex is the most caudal tip of the fourth ventricle.
The fourth ventricle contains choroid plexus along its roof along the tela choroidea which may protrude out the lateral foramina of Luschka.
Related pathology
See also
Siehe auch:
- Pons
- Cerebellum
- intraventrikuläre Neoplasien und Läsionen
- Medulla oblongata
- brainstem glioma
- Cisterna quadrigeminalis
- Cisterna magna
- cerebral aqueduct (of Sylvius)
- dritter Ventrikel
- Hirnventrikel
- Foramina Luschkae
- cerebral peduncles
- obex
- Foramen Magendii
- Fossa rhomboidea
- flat floor of fourth ventricle sign
- rosette-forming glioneuronal tumour of the fourth ventricle
- lateral
und weiter:
- Developmental Venous Anomaly
- Cisterna cerebellomedullaris
- Nervus facialis
- animal and animal produce inspired signs
- Bochdalek-Blumenkörbchen
- Verschlusshydrocephalus
- facial colliculus
- Kleinhirnblutung
- aqueduct of Sylvius
- communicating obstructive hydrocephalus
- paediatric intraventricular haemorrhage
- rosette-forming glioneuronal tumours
- bat wing 4th ventricle
- Rosettenbildender glioneuronaler Tumor
- bruns sign
- Fastigium des 4. Ventrikels
- batwing fourth ventricle
- tuberkulöse Meningitis
- Hydrocephalus communicans
Assoziationen und Differentialdiagnosen zu vierter Ventrikel:
