Cutaneous & Superficial Structures of the Neck Flashcards
Attachments and Main Action/s
Platysma
Attachments:
Superior/Proximal: Skin & Inferior Border of Mandible
Inferior/Distal: Fascia covering Superior Pectoralis Major and Deltoid
Action:
Draws Mouth Inferiorly & Skin of Neck Superiorly when teeth are clenched
Sternocleidomastoid
Attachments:
Superior/Proximal: Mastoid Process & Superior Nuchal Line
Inferior/Distal: Sternal Head to Anterior Manubrium & Clavicular Head to Clavicle
Action:
Unilaterally - Tilts Head to same side and Rotates it
Bilaterally - Extends Neck (Atlanto-occipital Joint), Flexes Cervical Vertebrae or Extend Superior/Inferior Vertebae to thrust chin forward. Can also Assist Respiration
Trapezius
Attachments:
Superior/Proximal: External Occipital Protuberance & Nuchal Line & Spinous Processes C7-T12
Inferior/Distal: Lateral Clavicle & Acromion & Spine of Scapula
Action:
Descending Fibres - Elevate Scapulae, Maintain against Gravity
Ascending Fibres - Depresses Scapulae
Together - Rotate Glenoid Cavity Superiorly
Transverse Fibres - Retract Scapluae & With Fixed Shoulders can Extend Neck (Bilateral) or Laterally Flex (Unilateral)
