MSA2 Head and Neck Muscles

Card Set Information

Author:
barbostick
ID:
83130
Filename:
MSA2 Head and Neck Muscles
Updated:
2011-05-01 22:41:16
Tags:
Soma MSA2 muscles head neck
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Description:
Muscles that move the head and neck
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  1. SCM
    • Origins: Sternal head- superior manubrium; clavicular head- medial third of superior clavicle
    • Insertions: Mastoid process of temporal bone; lateral superior nuchal line of occiput (same as splenius capitis)
    • Bilateral actions: neck flexion, assists to elevate the ribs in inhalation
    • Unilateral actions: ipsilateral lateral flexion of head; contralateral roation of head
    • Ropy at manubrium
    • Superficial
  2. Anterior Scalenes
    • Origin: TVPs of C3 - C6
    • Insertion: First rib
    • Bilateral actions: Elevates ribs during forced inhalation; neck flexion
    • Unilateral actions: ipsilateral lateral neck flexion; contralateral cervical rotation
    • Nonropy
    • Both- deep to SCM
  3. Middle Scalenes
    • Origin: TVPs of C2 - C7
    • Insertion: First rib
    • Bilateral actions: Elevates ribs during forced inhalation
    • Unilateral actions: ipsilateral lateral neck flexion; contralateral cervical rotation
    • Nonropy
    • Both- deep to SCM (clavicular head)
  4. Posterior Scalenes
    • Origin: TVPs of C6 - C7
    • Insertion: Second rib
    • Bilateral actions: Elevates ribs during forced inhalation
    • Unilateral actions: ipsilateral lateral neck flexion; contralateral cervical rotation
    • Nonropy
    • Both- deep to SCM
  5. Semispinalis
    • Origin: TVPs of C4 - T5
    • Insertion: Between the superior and inferior nuchal lines of the occiput
    • Action: Extends head, cervical and thoracic spine
    • Nonropy
    • Deep to several muscles

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