Habenulae

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The habenulae (from the Latin. HABENA "reins"), even Epiphysenstiele , are part of the Epithalamus and thus of the midbrain . The habenula is roughly divided into a medial habenula and a lateral habenula.

These are two thin medullary bundles that connect the pineal gland ( glandula pinealis , epiphysis ) with the thalamus (hence the name "epiphyseal stalk"). Both habenulae continue as the Stria medullaris thalami , which connects the olfactory center in the olfactory brain with the nuclei of the habenulae ( Nuclei habenulares ). The afferent impulses from the substantia perforata anterior ( area olfactoria , septum nuclei) and the region preoptica reach the habenula nuclei via the stria medullaris thalami , which also receive impulses from the corpus amygdaloideum via the stria terminalis . The habenulae with their core areas form a switching station for olfactory impulses. After switching, the olfactory information is forwarded to the salivatory (saliva production) and motor (chewing) nuclei of the brain stem .

The nuclei habenulares on both sides are connected to one another via the commissura habenularum . The function of the rein cores has not been conclusively clarified. Presumably they are switching stations for olfactory pathways that run between the olfactory brain and the autonomous centers in the brain stem .

literature

  • Martin Trepel: Neuroanatomy . Urban & Fischer, 3rd edition 2003. ISBN 3-437-41297-3
  • Franz-Viktor Salomon: nervous system, systema nervosum . In: Salomon / Geyer / Gille (Hrsg.): Anatomy for veterinary medicine . Enke Stuttgart, 2004, pp. 464-577. ISBN 3-8304-1007-7
  • Michael Schünke: Prometheus: Head, Neck and Neuroanatomy . Thieme Verlag, 2nd edition 2009. ISBN 978-3-13-139542-9

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