Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

An accessory extensor digiti minimi arising from extensor carpi ulnaris

T Nakashima1

  • 1Department of Anatomy and Anthropology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.

Journal of Anatomy
|February 1, 1993
PubMed
Summary

An accessory extensor digiti minimi muscle slip from the extensor carpi ulnaris was found in 34.2% of wrists studied. This anatomical variation can insert into the fifth metacarpal bone, impacting little finger extension.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Effects of acute administration of nicotine on convulsive movements and blood levels of corticosterone in old rats.

Japanese journal of pharmacology·1992
Same author

Activation of human herpesvirus-6 in children with acute measles.

Journal of medical virology·1992
Same author

Fatal encephalitis/encephalopathy in primary human herpesvirus-6 infection.

Archives of disease in childhood·1992
Same author

Activation of phospholipase D by platelet-derived growth factor (PDGF) in rat C6 glioma cells: possible role in mitogenic signal transduction.

Neurological research·1992
Same author

Clinical analysis of a series of vertebral aneurysm cases.

Neurosurgery·1992
Same author

A prospective study of human herpesvirus-6 infection in renal transplantation.

Transplantation·1992

Area of Science:

  • Anatomy
  • Orthopedics
  • Surgical Anatomy

Background:

  • Anatomical variations in the extensor muscles of the hand can affect wrist and finger function.
  • The extensor digiti minimi proprius is a key muscle for little finger extension.
  • Accessory muscle slips can alter biomechanics and diagnostic interpretation.

Purpose of the Study:

  • To investigate the prevalence and insertion patterns of an accessory extensor digiti minimi slip originating from the extensor carpi ulnaris.
  • To document variations in the anatomical course and attachments of this specific accessory slip.

Main Methods:

  • Dissection of 240 adult upper limbs.
  • Observation and documentation of accessory tendinous slips in the sixth extensor compartment at the wrist.

Related Experiment Videos

  • Recording of insertion sites on the fifth metacarpal bone.

    • Main Results:

    • An accessory tendinous slip originating from the extensor carpi ulnaris was identified in 82 out of 240 (34.2%) upper limbs.
    • The slip most commonly inserted at the base of the fifth metacarpal bone with the main extensor digiti minimi tendon (29.6%).
    • Less frequent insertions were observed on the midportion (2.5%) and head (1.7%) of the fifth metacarpal bone.

    Conclusions:

    • The accessory extensor digiti minimi arising from the extensor carpi ulnaris is a relatively common anatomical variation.
    • Understanding these variations is crucial for accurate diagnosis and surgical procedures involving the wrist and hand.
    • This specific variant, when inserting into the extensor aponeurosis of the little finger, aligns with descriptions by Kaplan & Spinner (1984).