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Masseter
Origin- Zygomtatic arch
Insertion- Angle and Ramus of mandible
Action- Elevate mandible and Close Jaw
-
Sternocleidomastoid
Clavicular head
Origin-Sternal end of clavicle
Insertion- Mastoid process of temporal bone.
Both sides together- Flex neck
One side: Opposite rotation of head& lateral flexion of neck.
-
Sternocleidomastoid
Sternal head
Manubrium & Sternum
Both sides together- Flex neck
One side: Opposite rotation of head& lateral flexion of neck.
-
Vertebral Column
Erector Spimae Group
Action- Both sides acting together- Extend vertebral column.
One side: Laterally flexes vertebral column.
-
Trapezius (3 parts)
(positions the pectoral girdle)
Origin- Occipital bone,
Insertion- Clavicle (lateral end) Scapula (acromion & spinae)
- Action-
- Upper- Extends neck: elevates scapulae
- Middle-Retracts or adducts scapulae
- Lower-Depresses scapulae
-
Deltoid
(3 divisions Anterior, middle, posterior)
- O- Clavicle (lateral end) Scapula (acromion & spinae)
- Insertion- Deltoid tuberosity of humerus.
- Action-
- Anterior- flexes humerus; medially rotates humerus.
- Middle- Abducts humerus
- Posterior- Extends and hyperextends humerus, laterally rotates humerus.
-
Rotator cuff Muscle group
(4 Muscles)
- Supraspinstus
- Infraspinatus
- TEres Minor
- Subscapularis
-
Supraspinatus
- Origin- Supraspinos Fossa of scapula
- Insertion- greated tubercle of humerus
- Action- Stabilize shoulder joint, Abducts arm
-
Infraspinatus
- Origin-Infraspinous fossa of scapula
- Insertion- Greater tubercle of humerus
- Action-Stabilize shoulder joint, Laterally rotate humerus
-
Teres Minor
Origin-Lateral border of scapula
Insertion- Greater tubercle of humerus
Action- Stabilize shoulder joint, Lateraly rotate humerus.
-
Subscapularis
Origin- Subscapular fossa
Insertion- Lesser tubercle of humerus
Action-Stabilize shoulder joint; Medially rotate humerus
-
Teres Major
Origin-Inferior angle of scapula
Insertion- Intertubercular sulcus of humerus
Action- Extends and medially rotate humerus
-
Latissmus dorsi
Origin- Spinous process of lower thoracic & lumbar vertebrae; flase ribs; thoracolumbar fascia
Inertion-Intertubercular sulcuss of humerus
Action- Extends, adducts, medially rotates humerus.
-
Biceps Brachii
Long Head
Origin- Superior border of glenoid fossa
Insertion- Radial tuberosity
Action- Flexion of shoulder & elbow, Supination of forearm.
-
Biceps Brachii
Short head
Origin- Coracoid process
Insertion- Radial tuberosity
Action- flexion of shoylder & elbow, upination of forearm.
-
Triceps Brachii
Long Head
Lateral Head
Meadial Head
- All
- Insertion- Olecranon process of ulna
Action- Elbow extension
- ONLY LONG HEAD
- A- (also adduction of humerus)
-
Piriformis
Origin- Sacrum
Insertion- Greater trochanter of femur
Action- Lateral rotation of thigh, hip extension
-
Tensor fascia Latae
Origin- Anerior, superior iliac spine & Iliac crest
Insertion- Illiotibial tract
Action- Laterally supports knee by tensing illiotibial tract (Plus abduction of hip)
-
Gracillis
Origin- Inferior pubic Ramus
Insertion- Medial surface of tibia inferior to medial condyle. (Proximal medial tibia)
Action- Adducts thigh at hip, flexes leg at knee.
-
Psoas Major
Action- flex thigh at hip, flex vertebral column (as in old style sit-up)
-
vastus lateralis
Origin- Greater trochanter & linea aspera of femur
Insertion- Tibial tuberosity via quadriceps tendon, patella & patellar ligament. ALL
Action- Extends leg at knee.
-
Rectur Femoris
Origin- Anterior, Inferior iliac spine (AIIS)
Insertion-Tibial tuberosity via quadriceps tendon, patella & patellar ligament. ALL
Action- Extends leg at knee (also flexes hip (brings femur closer to torrso)
-
vastus Medialis
Origin-Linea Aspera of femur
Insertion- Tibial tuberosity via quadriceps tendon, patella & patellar ligament. ALL
Action- Extends leg at knee
-
Vastus Intermedius
Origin- Anterolateral surface of femur
Insertion- Tibial tuberosity via quadriceps tendon, patella & patellar ligament. ALL
Action- Extends leg at knee
-
Biceps Femoris
Long Head
Origin- Ischial tuberosity
Insertion- Head of fibula, LAteral condyle of tibia
Action- Knee flexion & hip extension
-
Biceps Femoris
Short Head
Origin- Linea aspera
Insertion- Head of fibula, lateral condyle of tibia
Action- Knee Flexion (does not cross hip so cannot act as tht joint)
-
Semimembranosus
Origin- Ischial tuberosity
Insertion- Medial condyle of tibia (posterior surface)
Action- Knee Flexion & hip extension
-
Semitendenosus
Origin-Ischial tuberosity
Insertion- Proximal, medial surface of tibia
Action- Knee flexion * Hip extension
-
Sartorius
Origin- Anterior superios iliac spine (ASIS)
Insertion- Near tibial tuberosity
Action- Flex, abduct and laterally rotate thigh @ hip joint & knee flexion.
-
Gastrocnemius
Origin- Just above femoral condyles
Insertion- Calcaneus (via calcaneus tendon)
Action- Plantar flexiom & knee flexion
-
adduction
retraction of scapulae
-
Abduction
Protraction of scapulae
-
External rotation
Lateral rotation
-
Internal rotation
Medial rotation
-
Ligamentum Nuchae
A large elsatic ligametn that connects spinous processes of cervial vertebrae and insert on occipital bone.
-
Muscles that position the pectoral girdle
trapezius
-
Muscles that move the brachium
- Deltoid
- Supraspnatus
- Infraspinatus
- Teres Minor
- Subscapularis
- Teres Major
- Latissimus dorsi
-
Muscles that move the antebrachium
- Biceps brachii- long head/ short head
- Triceps Brchii- Long/ lateral/ meadial
-
Muscles that moce the femur
- Piriformis
- Tensor Fascia latae
- Gracillis
- Psoas major
-
Muscles that move the leg
- Vastus lateralis
- Vastus medialis
- REctus femoris
- Vastus intermedius
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