The spine/neck and face Flashcards
Temporalis muscle’s origin (where it is found), insertion (what it connects to), and it’s action?
Origin is temporal fossa and line (area above ear and next to eye)
Insertion is coronoid process of mandible
Action is closes and retracts jaw
Massester muscle’s origin (where it is found), insertion (what it connects to), and it’s action?
Origin is the zygomatic bone
Insertion is the angle and ramus of mandible
Action is it closes the jaw
Orbicularis Oculi muscle’s origin (where it is found), insertion (what it connects to), and it’s action?
Origin is circular muscle on frontal bone and maxilla
Insertion eyelid?
Action is it closes the eye
Orbicularis oris muscle’s origin (where it is found), insertion (what it connects to), and it’s action?
Origin is circular muscle on maxilla, septum of nose and mandible Insertion is around the lips Action is closes and protrudes lips
What is the Longus capitis’s (neck muscle) origin, insertion and action?
C3-C6
Occipital bone anterior to foramen magnum
Flexes neck
What is the Scalenus’s (neck muscle) origin, insertion and action?
Posterior: Origin is Transverse processes of C4-C6 2nd rib is insertion
Middle: C2-C6 is origin 1st rib medial
Anterior: Origin is C3-C6 Insertion is 1st rib anterior
Action: Together - flexes neck Singulary - rotates neck or lateral flexion (leaning head in one direction)
What is the Sternocleidomastoid (neck muscle) origin, insertion and action?
Origin is the manubrium and clavicle as it has 2 heads
Insertion is the mastoid process
Action - singulary roation and lateral flexion Together - flexion
What is the Splenius capitis (neck muscle) origin, insertion and action?
Origin- C7 + T1-T3
Insertion - mastiod process
Action - together extends neck Singulary - Rotates and laterally flexes neck (runs down back of neck)
What is the Platysma (neck muscle) origin, insertion and action?
Origin - upper fourth of chest
Insertion - anterior part of the manubrium
Action - depresses manubrium and draws up skin on chest
