A&P Muscles Study Guide.pdf

A&P Muscles Study Guide.pdf - Muscles of Axial Skeleton...

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Muscles of Axial Skeleton Muscle General Area Superficial/Deep Origin (less moveable) Insertion (more moveable) Action Comments Frontalis Forehead Superficial Raise Eyebrows Occipitalis Back of head Superficial Pulls scalp posterior Orbicularis Oculi Around eyes Superficial Blink Orbicularis Oris Around lips Superficial Kiss Zygomaticus major and minor Cheek bone to the lips Superficial Zygomatic Bone Skin and muscles at corners of mouth Smile Masseter Cheek/jaw Superficial Zygomatic Arch, maxilla Lateral surface of mandible Elevate mandible Temporalis Side of head Superficial Elevate and retract mandible Sternocleidomastoid Neck Superficial Manubrium of sternum and clavicle Mastoid process of temporal bone Flex neck and rotate head toward opposite side Scalene (antieror, middle, posterior) Neck Flex and rotate neck Digastrics anterior and posterior Throat Elevate hyoid Myohyoid Throat Elevates hyoid bone during swallowing Sternohyoid Throat Depress larynx and hyoid bone Lavator scapulae Cervical/scapula Elevate and adducts scapula Pectoralis Minor Chest Deep Elevates upper ribs, move scapula forward Serratus anterior Chest/rib cage Deep Move scapula forward, rotate scapula laterally Serratus = serrated like a knife External intercostals Ribs Elevate rib cage, inspiration External = inspiration (E=I) Internal intercostals Ribs Depress rib cage, expiration Internal = Expiration (I=E) Diaphragm Abdomen Prime move of inspiration Separates thoracic cavity from abdominal cavity Rectus abdominis Abdomen Superficial Pubis Xiphoid process and costal cartilages of ribs Flex vertebral column Rectus = straight External Oblique Abdomen (sides) Superficial Trunk rotation Internal oblique Abdomen (sides) Deep Trunk rotation
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  • Fall '19
  • Muscles of the upper limb

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