May CA, Mätz-Rensing K, Aschoff D, Bramke S. Muscle spindles in the rhesus monkey platysma.
J Anat 2021;
240:936-940. [PMID:
34893983 PMCID:
PMC9005687 DOI:
10.1111/joa.13604]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/15/2021] [Accepted: 11/22/2021] [Indexed: 11/28/2022] Open
Abstract
The platysma of the rhesus monkey consists of two parts: a platysma myoides located similar to the human platysma, and a platysma cervicale passing the dorsal cervical region and being in contact with the cheek pouch. Our investigation showed that the muscle fiber morphology was comparable in both parts. Muscle spindles were only present in regions connected to the cheek pouch and contained only nuclear chain fibers. It is tempting to speculate that they sense the filling of the cheek pouch rather than mimic activities.
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