Muscles students need to know:

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Presentation transcript:

Muscles students need to know: Rotator Cuff Deltoid (delts) Pectorals (pecs)  Biceps External Obliques (waist) Quadriceps (quads) Tibialis Anterior (shins) Internal Obliques (waist)   Adductors (inner thighs)

Erector Spinae (lower back) Deltoid (delts) Rhomboids Erector Spinae (lower back) Hamstrings (hams)   Trapezius (traps) Triceps Latissimus Dorsi (lats) Forearm Gluteus Medius (outer thigh) Gluteus Maximus (glutes) Gastonemius (calves) Soleus (calves)

C. Muscles of the Head 1 . Muscles of Facial Expression

a. frontalis * L: forehead * A: elevates eyebrows/wrinkles brow

Frontalis Origin: Epicranial aponeurosis Insertion: Skin over forehead Action: Elevates eyebrows and wrinkles skin of forehead

b. orbicularis oculi * L: circles the eye * A: closes eye

c. orbicularis oris * L: circles mouth * A: closes/puckers lips “kiss”

Orbicularis Oris Origin: By muscular skips to surround muscles Insertion: Muscles interlace to surround mouth Action: Closes and purses lips

d. buccinator * L: cheek * A: compresses cheek “trumpeter’s muscle”

e. zygomaticus * L: cheek mouth * A: raises corner of mouth “smiling muscle”

2. Muscles of Mastication (Chewing) a. masseter * L: jaw * A: elevates mandible (closes jaw)

Masseter Origin: Zygomatic process and arch Insertion: Angle and ramus of mandible Action: Elevates mandible

b. temporalis * L: temporal region * A: elevates mandible (closes jaw)

Temporalis Origin: Temporal fossa Insertion: Coronoid process of mandible Action: Elevates and retracts mandible

Muscles of Mastication

D. Muscles of the Neck

1. Muscles that Move the Head a. sternocleidomastoid * L: anterior lateral neck * A: rotates head (1), flexes neck (2)

Muscles of the Anterior Neck and Throat: Suprahyoid

Sternocleidomastoid Origin: Manubrium and medial third of clavicle Insertion: Mastoid process Action: Rotates head to opposite side, extends head, and flexes vertebral column

Muscles of the Neck: Head Movements Figure 10.9a

b. trapezius * L: posterior neck/upper back * A: extends head, adducts/elevates scapula

Trapezius Origin: External occipital protuberance, superior nuchal line and spinous process of C7-T12 Insertion: Anterior border of scapular spine, acromion process, lateral third of clavicle Action: Elevates, adducts, and depresses scapula