Muscles ll COPY Flashcards
Digastric
O: Mandible, Mastoid Process
I: Hyoid Bone
A: Opens Mouth Widely and Depresses Mandible
Buccinator
O: Alveolar Process of Maxilla and Mandible
I: Orbicularis Oris
A: Compress Cheek, Blowing and Sucking
Masseter
O: Zygomatic Arch
I: Mandible
A: Elevates Mandible
Note: Strongest muscle in body, 200 lb of pressure per square foot
Omohyoid
O: Superior Border, Scapula
I: Hyoid Bone
A: Depresses Hyoid After Elevation
Stylohyoid
O: Styloid Process
I: Hyoid Bone
A: Elevates Hyoid
Fascia
Sheet of connective tissue
Lumbodorsal Fascia
Tendon
Rope of connective tissue
Achilles Tendon
Zygomaticus Major
O: Zygomatic Bone
I: Angle of Mouth
A: Draws Mouth Upward and Laterally, Smiling
Rhomboid
O: T2-T5 spinous process
I: Medial Border Scapula
A: Rotate Scapula
Orbicularis Oculi
O: Orbit
I: Eyelids
A: Close eyes
Spinalis
O: C7, L2
Insertion: C2-C4, T4-T8
A: Extends head and vertebral column
Trapezius
O: Occipital Bone, C7-T12
I: Acromion, Spine of Scapula, Clavical
A: Extends Head
Retinaculum
Connective Tissue Strap
Extensor Retinaculum
Orbicularis Oris
O: Skin around Mouth
I: Lips
A: Close and protrude lips, pout
Mentalis
O: Mandible
I: Skin of Chin
A: Elevate and protrude lips, pouting
Levator Scapulae
O: C1-C4 transverse processes
I: Scapula
A: Elevates Scapula
Teres Major
O: Inferior Border of Scapula
I: Intertubercular Sulcus
A: Medially Rotate Shoulder
Platysma
O: fascia of Deltoid, Pec. Major
I: Mandible
A: Draw Mouth Downward, Horror look
Quadratus Lumborum
O: Iliac Crest
I: rib 12, vertebrae L1-L4
A: Extends lumbar vertebral column
Frontalis
O: Galea Apponeurotica
I: Skin of Forehead
A: Raise eyebrow, Wrinkle forehead
Temporalis
O: Parietal Bone
I: Mandible
A: Elevates Mandible
Aponeurosis
Sheet of connective tissue
Ex. Galea aponeurotica
Latissimus Dorsi
O: T7-L5, Iliac crest
I: Intertubercular Sulcus
A: Extend Shoulder
