• Neck Anatomy

    Posted on August 9, 2011 by Dawn in Anatomy, Human Body.

    Longissimus Capitis

    O:  transverse processes of about T2 thru about C5

    I:  Mastoid process of the temporal bone

    A:  rotates, extends, and laterally flexes the head

     

    Spinalis Cervicis

    O:  spinous process of C7 and ligamentum nuchae

    I:  spinous processes of C2 – C4

    A:  extends the vertebrae and laterally flexes the head

     

    Spinalis Capitis

    O:  transverse processes of C7 – T6

    I:  between the superior and inferior nuchal ones of the occiput

    A:  Extends the head

     

    Rectus Capitis Posterior Major

    O:  Spinous process of C2

    I:  inferior nuchal line of the occiput

    A:  extend and rotate the head

     

    Rectus Capitis Posterior Minor

    O:  the tubercle on the posterior arch of C1, the atlas

    I:  medial aspect of the inferior nuchal line of the occiput

    A:  extends the head

     

    Obliquus Capitis Superior

    O:  superior aspect of the transverse process of the atlas (C1)

    I:  lateral 1/2 of the inferior nuchal line of the occiput

    A:  extends and laterally flexes the head

     

    Use “back muscle deep group copy”

     

    Obliquus Capitis Inferior

    O:  spinous process of the axis (C2)

    I:  lower posterior aspect of the transverse process of the atlas (C1)

    A:  rotation of the head and atlas

     

    Anterior Scalene

    O:  Transverse Processes of C3 through C6

    I:  1st Rib

    A: Lateral flexion of head and neck, mild opposite side rotation of the neck, and elevation of the 1st rib

    during forced inhalation

     

    Middle Scalene

    O:  Transverse Processes of C2 through C7

    I:  1st Rib

    A:  Lateral flexion of head and neck and elevation of the 1st rib during forced inhalation

     

    Posterior Scalene

    O:  Transverse Processes of C5 through C7

    I:  2nd Rib

    A:  Lateral flexion of head and neck, mild same side rotation of the neck, and elevation of the 2nd rib

    during forced inhalation

     

    Sternocleidomastoid

    O:  Manubrium of the Sternum and the medial 1/3 of the clavicle

    I:  Mastoid process of the Temporal bone

    A:  Extension, mild same side lateral flexion, and opposite side rotation of the neck and head

     

    Digastric

    O:  Posterior belly – Mastoid Process

    Anterior belly – Inferior Border of Mandible

    I:  Intermediate tendon attached to Hyoid Bone

    A:  Posterior belly – raises hyoid

    Anterior belly – depresses mandible

     

     

     

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