Neck and Hyoid Muscles

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  1. The body's most highly toned muscles
    • Neck muscles:
    • Platysma: Raises skin of neck, pulls corners of mouth down
    • SCM: unilateral contraction (head bends to side), bilateral contraction (flexion between the neck and skull
    • Trapezius: lifts the clavicle and scapula - hunching of the shoulders.
  2. Hyoid muscle groups:
    • Suprahyoid- muscles originate above hyoid bone
    • Infrahyoid- muscles originate below hyoid bone
  3. Suprahyoid muscles;
    • Mylohyoid muscle- elevates hyoid bone depresses the mandible and helps elevate tongue
    • Digastric muscles- anterior and posterior bellies- depresses mandible- opens and elevates hyoid bone and larynx during swallowing
    • Stylohyoid muscles- elevates hyoid bone and larynx
  4. Infrahyoid muscles
    • Omohyoid- depresses hyoid bone and larynx 
    • Sternohypid muscle- depresses hyoid bone
    • Thyrohyoid- depresses hyoid bone
    • Sternothyroid- depresses larynx.

Card Set Information

Author:
Brittanyellis
ID:
332401
Filename:
Neck and Hyoid Muscles
Updated:
2017-06-21 11:20:51
Tags:
biology
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Description:
neck and hyoid muscles
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