peduncle (anatomy)

{{short description|Elongated stalk of tissue}}

{{Distinguish|Pedicle (disambiguation){{!}}Pedicle (anatomy)}}

{{Other uses|Sessility (disambiguation)}}

A peduncle is an elongated stalk of tissue. Sessility is the state of not having a peduncle; a sessile mass or structure lacks a stalk.{{Cite book|title = The Cambridge Illustrated Glossary of Botanical Terms|url = https://books.google.com/books?id=0Yja1lL_pJYC|publisher = Cambridge University Press|date = 2000-11-16|isbn = 9780521794015|language = en|first = Michael|last = Hickey|first2 = Clive|last2 = King|page = 30}}

In medicine, a mass such as a cyst or polyp is said to be pedunculated if it is supported by a peduncle.{{Cite book|title = Comprehensive Medical Terminology|url = https://books.google.com/books?id=beoIAAAAQBAJ|publisher = Cengage Learning|date = 2010-06-24|isbn = 1133416934|language = en|first = Betty|last = Jones|page = 1140}}

There are in total three types of peduncles in the cerebellum of the human brain, known as superior cerebellar peduncle, middle cerebellar peduncle, and inferior cerebellar peduncle.{{Cite journal |last=Perrini |first=Paolo |last2=Tiezzi |first2=Giacomo |last3=Castagna |first3=Maura |last4=Vannozzi |first4=Riccardo |date=2013-04-01 |title=Three-dimensional microsurgical anatomy of cerebellar peduncles |url=https://link.springer.com/article/10.1007/s10143-012-0417-y |journal=Neurosurgical Review |language=en |volume=36 |issue=2 |pages=215–225 |doi=10.1007/s10143-012-0417-y |issn=1437-2320}}

Pedunculated eyes are also the defining attribute of the stylophthalmine trait found in certain fish larvae. The caudal peduncle is a slightly narrowed part of a fish where the caudal fin meets the spine.{{Cite book|title = Comparative Anatomy: Manual of Vertebrate Dissection|url = https://books.google.com/books?id=-cFnBwAAQBAJ&pg=PA552|publisher = Morton Publishing Company|date = 2015-03-01|isbn = 9781617314391|language = en|first = Dale W.|last = Fishbeck|first2 = Aurora|last2 = Sebastiani|page = 552}}