Fasciculus (anatomy)

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A muscle fascicle.
Nerve fascicle.

In anatomy and histology, substructures consisting of several nerve or muscle fibers are referred to as fasciculus ( plural fasciculi ), also called fascicles ( dt. 'Small bundle', 'parcel'; engl. Fascicle ) . The substructure is a bundle of several individual fibers. Nerve fibers are also referred to as a nerve fascicle and muscle fibers as a muscle fascicle .

In nerve fibers, the individual fascicles are surrounded by what is known as the perineurium , a connective tissue rich in collagen. In muscle fibers, the perimysium fulfills this function.



  • R. Lüllmann-Rauch: pocket textbook histology. Georg Thieme Verlag, 2006, ISBN 3-131-29242-3 , p. 203.
  • W. Dauber and H. Feneis: Bildlexikon der Anatomie. Georg Thieme Verlag, 2004, ISBN 3-133-30109-8 , p. 416.