Posterior auricular muscle

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Posterior auricular muscle
Gray906.png
The muscles of the auricula
Auricularis posterior.png
Auricula in context.
Details
Origin Mastoid Process
Insertion Posterior ear
Artery Posterior auricular artery
Nerve Posterior auricular nerve of Facial nerve
Actions Pulls ear backward
Identifiers
Latin musculus auricularis posterior
TA A04.1.03.022
FMA 46857
Anatomical terms of muscle

The posterior auricular muscle consists of two or three fleshy fasciculi, which arise from the mastoid portion of the temporal bone by short aponeurotic fibers. They are inserted into the lower part of the cranial surface of the concha.

Post-auricular reflex[edit]

The post-auricular reflex is a vestigial muscle response in humans that acts to pull the ear upward and backward.[1] Research suggests neural circuits for pinna orienting have survived in a vestigial state for over 25 million years. It is often assumed the reflex is a vestigial Preyer reflex.[2]

References[edit]

  1. ^ Benning, Stephen D. (2011-03-01). "Postauricular and superior auricular reflex modulation during emotional pictures and sounds". Psychophysiology. 48 (3): 410–414. doi:10.1111/j.1469-8986.2010.01071.x. ISSN 1469-8986. PMC 2962877.
  2. ^ Hackley, Steven A. (2015-10-01). "Evidence for a vestigial pinna-orienting system in humans". Psychophysiology. 52 (10): 1263–1270. doi:10.1111/psyp.12501. ISSN 1469-8986.