Cell and Tissue Research

, Volume 322, Issue 2, pp 335–337

Multiunit arrector pili muscular structure as a variation observed by using computer-based three-dimensional reconstruction

Short Communication

DOI: 10.1007/s00441-005-0018-y

Cite this article as:
Song, WC., Hu, KS. & Koh, KS. Cell Tissue Res (2005) 322: 335. doi:10.1007/s00441-005-0018-y


The arrector pili (AP) muscle was recently suggested to comprise one AP muscular unit inserted into all the hair follicles contained within the follicular unit (FU). This study investigated the presence of variations in AP muscular units associated with the FUs. Human cadaver scalp skin specimens were serially sectioned and stained with Masson’s trichrome. Three-dimensional reconstructions of the serially sectioned images were analyzed on a computer, which revealed two types of variation in 20 FUs, one of which was the multiunit AP muscular structure, in which the AP muscular unit was inserted into two or more FUs.


Arrector pili muscleFollicular unitMultiunit AP muscular structureThree-dimensional reconstructionHuman

Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  1. 1.Department of Anatomy, College of MedicineKonkuk UniversityChungbukSouth Korea
  2. 2.Division of Anatomy and Developmental Biology, Department of Oral Biology, College of Dentistry, Oral Science Research Center, Brain Korea 21 Project for Medical SciencesYonsei UniversitySeoulSouth Korea