-
Orbicularis Oris
Origin: various facial muscles
Insertion: Lips
Action: Close Lips
-
Orbicularis Oculi
Origin: nasal portion of frontal bone
Insertion: Eyelids
Action: Blinking
-
Temporalis
Origin: Temporal Fossa
Insertion: Coronoid Process of mandible
Action: Elevates Jaw
-
Masseter
Origin: Zygomatic Arch
Insertion: Angle and ramus of mandible
Action: clenches teeth
-
Sternocleidmastoid
Origin: manubrium
Insertion: Mastoid Process of the Temporal Bone
Action: Rotation of head
-
Sternohyoid
Origin: manubrium
Insertion: Hyoid
Action: pulls down hyoid bone
-
Digastric
Origin: mastoid process
Insertion: fibrous loop on hyoid bone
Action: raises hyoid
-
Trapezius
Origin: occipital bone
Insertion: spine of scapula
Action: hyperextends head
-
Levator Scapulae
Origin: 1 to 4 cervical vertebrae
Insertion: Superior angle of scapula
Action: extends head backwards and flexes laterally
-
Splenius Group
Origin: 1st three thoracic vertebrae
Insertion: occipital bone
Action: extension and rotation of head
-
Pectoralis Major
Origin: Clavicle
Insertion: between greater and lesser tuberacles of humerus
Action: flexion of humerus
-
Pectoralis Minor
Origin: Ribs 3,4,5
Insertion: Coranoid process of the scapula
Action: Depresses shoulder by drawing the scapula downward
-
Deltoid (anterior, middle, posterior)
Origin: acrominon process
Insertion: deltoid tiberosity of humerus
Action: whole muscle abducts humerus
-
Serratus Anterior
Origin:1st to 9th ribs
Insertion: anterior medial border of scapula
Action: Pulls scapula downward, forward, and inward
-
External Intercostals (11 Pairs)
Origin: inferior borders of ribs
Insertion: superior border of ribs
Action: elevates ribs (aids in inspirtation)
-
Internal Intercostals (11 pairs)
Origin: superior border of ribs
Insertion: inferior borders of ribs
Action: deprsses ribs (aids in expiration)
-
Diaphram
Origin: inferior border of the ribs and sternum
Insertion: central tendon
action: inspiration
-
Latissimus Dorsi
Origin: lower 6 thoracic vertbrae
Insertion: greater tuberacle of the humerus
Action: extends humerous
-
Infraspinatus
Origin: infraspinous fossa of scapula
Insertion: greater tuberacle of humerus
Action: rotates humerus laterally
-
Teres Major
Origin: Inferior angle of scapula
Insertion: Crest of the lesser tuberacle of the humerus
Action: rotates humerus medially
-
Teres Minor
Origin: lateral border of scapula
Insertion: lowest portion of the greater tuberacle of humerus
Action: rotates humerus laterally
-
Supraspinatus
Origin: supraspinous fossa
Insertion: greater tuberacle of the humerus
Action: abduction of the humerus
-
Subscapularis
Origin: subscapular fossa
Insertion: lesser tubercle of the humerus
Action: holds head of humerus in glenoid cavity
-
Rhomboideus Major
Origin: spinous process of 1st to 5th thoracic vertebrae
Insertion: medial border of the scapula
Action: Adducts scapula
-
Rhomboideus Minor
Origin: ligamentum nuchae
Insertion: upper part of the medial border of scapula
Action: adducts scapula
|
|