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Ch10 Muscle list

Identify origin/ insertion/action

Orbicularis oculi Action: Closes eye Origin: Frontal and maxillary bones Insertion: Tissue around eyelid
Orbicularis oris Action: Closes lips Origin: Maxilla and mandible Insertion: Tissue around mouth
Zygomatic Major Action: Draws corners of mouth upward Origin: Zygomatic bone Insertion: Skin at corners of mouth
Buccinator Action: Compresses cheek against teeth Origin: Maxilla and mandible Insertion: orbicularis oris
Masseter Action: Closes jaw Origin: Zygomatic bone Insrtion: Mandible
Frontalis Action: Raises Eyebrows Origin: Gala Aponeurotica Insertion: Skin of eyebrows
Temporalis Action: Closes jaw Origin: Temporal bone Insertion: Mandible
Scalenes Action: Flexes neck Origin: Transverse process of cervical vertebrae Insertion: Flexes neck
Sternocleidomastoid Action: Flexes neck Origin: Manubrium of sternum and clavical Insertion: Mastoid process of temperal bone
External intercostals Action: Aids in inspiration Origin: Inferior border of rib above Insertion: Superior border of rib below
Internal intercostals Action: Aids in inspiration Origin: Superior border of rib below Insertion:Inferior border of rib above
Diaphragm Action: Inspiration Origin: Sternum, last six ribs and lumbar vertbrae Insertion: Central tendon
Pectoralis Major Action: flexes arm Origin: Sturnum, clavical, ribs 1-6 Insertion: Intertubercular sulcus of humerus
Serratus anterior Action: Protracts Scapula Origin: Ribs 1-8 Insertion: Vertebral border of scapula
Trapezius Action: Elevates Apex of shoulder Origin: Occiptal bone, C7 and all thoracic vertebrae Insertion: Clavical, acromion and spine of scapula
Rhomboid major Action: Retracts scapula Origin: Spinous process of T2-T5 vertebrae Insertion: Vertebral border of scapula
Latissismus dorsi Action: Extends arm Origin: T7-L5 vertebrae, iliac crest, last 3-4 ribs Insertion: Intertubercular sulcus of humerus
External oblique Action: laterally flexes trunk Origin:last 8 ribs Insertion: Linea alba, pubic crest and iliac crest
Internal oblique Action: Compresses abdominal contents Origin: Iliac crest and inguinal ligament Insertion: Linea alba, pubic crest and last 3 ribs
Transverse abdominis Action: Compresses abdominal contents Origin: Inguinal ligament, last 6 ribs, and iliac crest Insertion: Linea alba, and pubic crest
Rectus abdominis Action: Flexes vertebral column Origin: Pubic crest and symphysis Insertion: Xiphoid process and ribs 5-7
Deltoid Action: Flexes arm Origin: Clavical, acromion & spine of scapula Insertion: Deltoid tuberosity of humerus
Biceps brachii Action: Flexes arm Origin: Intertubercular sulcus of humerus, corocoid process of scapula Insertation: Radial tuberosity
Triceps brachii Action: Extends arm Origin: Glenoid cavity and humerus Insertion: Olecranon process of ulna
Flexor carpi radialis Action: flexes wrist Origin: Medial epicondyle of humerus Insertion: Metacarpals 2-3
Flexor carpi ulnaris Action: Flexes wrist Origin: Medial epicondyle of humerus & olecranon process of ulna Insertion: Metacarpal 5, pisiform & hamate bones
Palmaris longus Action: Flexes wrist Origin: Medial epicondyle of humerus Insertion: Skin and fascia of palm
Extensor carpi radialis Action: Extends wrist Origin: Humerus Insertion: Metacarpal 2
Extensor carpi ularis Action: Extends wrist Origin: Lateral epicondyle of humerus Insertion: Metacarpal 5
Extensor digitorum Action: Extends fingers Origin: Lateral epicondyle of humerus Insertion: Phalanges 2-5
Gluteus Maximus Action: Extends thigh Origin: Scrum,coccyx, and ilium Insertion: Gluteal tuberosity of femur
Tensor fascia latae Action: Abducts thigh Origin: Iliac crest and anterior superior iliac crest Insertion: Iliotibial band
Gracilis Action: Flexes knee Origion: Pubis Insertion: Tibia
Sartorious Action: Flexes knee Origin: Anterior superior iliac spine Tibia: Tibia
Biceps femoris Action: Extends Thigh Origin: Ischial tuberosity and femur Insertion: Head of fibula & lateral condyle of tibia
Semitendinosus Action: Extends thigh Origin: Ishial tuberosity Insertion: Tibia
Semimembranousus Action: Extends thigh Origin: Ischial tuberosity Insertion: Medial condyle of tibia & lateral condyle of femur
Rectus femoris Action: Extends knee Origin: Anterior inferior iliac spine and the acetabulum insertion: Tibial tuberosity and patella
Vastus lateralis Action: Extends knee Origin: Greater trochanter & linea aspera Insertion: Tibial tuberosity and patella
Vastus Medialis Action: Extends knee Origin: Linea aspera Insertion: Tibial tuberosity & patella
Vastus intermedius Action: Extends knee Origin: Femur Insertion: Tibial tuberosity & patella
Tibials anterior Action: Dorsiflexes foot Origin: Tibia Insertion: 1st cuniform & metatarsal 1
Extensor digitorum longus Action: Doriflexes foot Origin: Tibia and fibula Insertion: Phalanges of toes 2-5
Gastrocnemius Action: Plantarflexion Origin: Medial and lateral condyles of femur Insertion: Calcaneus
Soleus Action: Plantar flexion Origin: Tibia and fibula Insertion: Calcaneus
Fibularis Longus Action: Plantarflexion Origin: fibula Insertion: Metatarsal 1 and medial cuneiform



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