Note - please check that the term does not already exist (check OLS: https://www.ebi.ac.uk/ols/ontologies/cl)

Preferred term label:

intrafusal muscle fiber

Synonyms
myofibra intrafusalis

Definition (free text, please give PubMed ID in format PMID:XXXXXX)

A skeletal muscle fiber that is part of a muscle spindle. These are specialized muscle fibers that serve as proprioceptors, detecting the amount and rate of change in length of a muscle. They are innervated by both sensory neurons and motor neurons (gamma and beta motorneurons, collectively referred to as fusimotor neurons). [DOI:10.1016/B978-0-443-10321-6.00004-7, Wikipedia:Intrafusal_muscle_fiber&oldid=937508784]

Parent cell type term (check the hierarchy here https://www.ebi.ac.uk/ols/ontologies/cl):

skeletal muscle fiber CL_0008002

• This is specified as being striated, but it looks like this applies to intrafusal fibers too: https://www.sciencedirect.com/topics/neuroscience/intrafusal-muscle-fiber#:~:text=They%20contain%20striated%20muscle%20within,of%20the%20muscle%20are%20extrafusal.

What is the anatomical structure that the cell is a part of? Please check Uberon: https://www.ebi.ac.uk/ols/ontologies/uberon

muscle spindle http://purl.obolibrary.org/obo/UBERON_0003718

xrefs

TH:H3.03.00.0.00007

Your nano-attribution (ORCID)

0000-0002-7073-9172

Any additional notes or concerns

Need to define gamma & beta motor neuron