Septum pellucidum
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View Callum Smith's current disclosuresAt the time the article was last revised Daniel J Bell had no financial relationships to ineligible companies to disclose.
View Daniel J Bell's current disclosuresThe septum pellucidum is a thin transparent membrane located in the brain between the body and anterior horns of the lateral ventricles.
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Gross anatomy
It extends from the rostrum, genu and anterior portion of the body of the corpus callosum to the fornix. It separates the anterior horns of the lateral ventricles and has two layers (laminae) that are adherent to each other. The function of the septum pellucidum is not fully understood 1-4. The septum pellucidum is 1.5-3.0 mm thick.
Relations
superior: body of corpus callosum
inferior: rostrum of corpus callosum
anterior: genu of corpus callosum
posterior: third ventricle
lateral: anterior horns and body of lateral ventricles
Histology
The septum pellucidum is lined with ependymal cells on its ventricular side whilst pia mater lines the cavity. It also contains scattered glial cells, nerve fibres and veins 1,2.
Variant anatomy
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Development
The septum pellucidum develops at 10-12 weeks of gestation from the primitive lamina terminalis or the commissural plate. Its development is closely linked with that of the corpus callosum and is complete by 17 weeks of gestation 1.
History and etymology
It is derived from the Latin word "pellucidum" meaning transparent.
References
- 1. Sarwar M. The septum pellucidum: normal and abnormal. AJNR. American journal of neuroradiology. 10 (5): 989-1005. Pubmed
- 2. Mcminn. Last's Anatomy. ISBN: 9780729537520
- 3. Winter T, Toscano MM. Proper latin terminology for the cavum septi pellucidi. AJR. American journal of roentgenology. 197 (6): W1170. doi:10.2214/AJR.11.7152 - Pubmed
- 4. Susan Standring. Gray's Anatomy. ISBN: 9780702068515
Incoming Links
- Hydrocephalus
- Obstructive hydrocephalus
- Amnestic syndrome of the subcallosal artery
- Corpus callosum
- Alobar holoprosencephaly
- Septal cerebral veins
- Absent septum pellucidum
- Subfalcine herniation
- Anterior cerebral artery
- Cavum vergae
- Midline shift (summary)
- Callososeptal interface
- Intraventricular neoplasms and lesions
- Cavum septum pellucidum
- Fornix (brain)
- Midline shift
- Lobar holoprosencephaly
- Myxoid glioneuronal tumour
- Semilobar holoprosencephaly
- Ruptured saccular aneurysm
- Central neurocytoma
- Alobar holoprosencephaly
- Central neurocytoma
- Bilateral stenosis of the foramina of Monro
- Central neurocytoma
- Alobar holoprosencephaly
- Septum pellucidum haemorrhage
- Alobar holoprosencephaly
- Semilobar holoprosencephaly
- Central neurocytoma
- Alobar holoprosencephaly
- Septo-optic dysplasia (fetal MRI)
- Septo-optic dysplasia
- Schizencephaly and absent septum pellucidum
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