Wk 8 Lab Flashcards
Origin
More stationary attachment point of a muscle
Insertion
More mobile attachment point of a muscle
Aponeurosis
broad, flat, sheet-like tendon connecting muscles to bone or other muscles
Epicranius frontalis origin, insertion, and action
Origin: aponeurosis
Insertion: skin of eyebrows
Action: raises eyebrows
Epicranius occipitalis origin, insertion, and action
Origin: occipital bone
Insertion: aponeurosis
Action: pulls scalp posteriorly
Orbicularis oculi origin, insertion, and action
Origin: frontal, maxilla
Insertion: skin of eyelid
Action: closes eyelid
Temporalis origin, insertion, and action
Origin: temporal fossa
Insertion: coronoid process - mandible
Action: elevates and retracts mandible
Masseter origin, insertion, and action
Origin: zygomatic arch - maxilla
Insertion: angle and ramus - mandible
Action: elevates mandible
Buccinator origin, insertion, and action
Origin: molar region - mandible, maxilla
Insertion: orbicularis oris
Action: compresses cheek
Orbicularis oris origin, insertion, and action
Origin: maxilla, mandible
Insertion: skin of mouth
Action: closes lips
Zygomaticus major and minor origin, insertion, and action
Origin: zygomatic bone
Insertion: skin/muscle at corners of mouth
Action: elevates corners of mouth
Risorius origin, insertion, and action
Origin: fascia of masseter
Insertion: skin at angle of mouth
Action: draws corners of lips laterally
Sternocleidomastoid origin, insertion, and action
Origin: manubrium, clavicle
Insertion: mastoid process - temporal
Action: flexes neck, head rotation
Anterior, middle, and posterior scalenes origin, insertion, and action
Origin: transverse process
Insertion: ribs 1 and 2
Action: rotate neck, elevate ribs
Levator scapulae origin, insertion, and action
Origin: transverse process
Insertion: scapula
Action: elevates and adducts scapula