描述

Origin: Anterior tubercle of transverse process of C6 or C7

Insertion: First rib - Suprapleural membrane (Sibson's fascia)

Artery: Ascending cervical artery, superficial cervical artery

Nerve: C7-C8

Action: Elevates the first rib - Supports suprapleural membrane

Description:
Extra muscle occasionally present between the scalenus anterior and medius, and having the same action and innervation.


命名学

Sibson's

影像

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