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Anatomy - Muscles

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What is the origin of the erector spinae   spinal proceses  
insertion of the erector spinae   spinal proceses  
action of erector spinae together   extend vertebral column  
action of 1 side of the erector spinae   lateral flexion or abduction  
action of the splenius-muscles together   extend neck  
action of the splenius-separate muscles   laterally flex neck to the same side  
action of the transversospinalis muslces   slight extension or roations of vertebral column  
origin of the trapezius   occipital bone; spinous processess C7-C12  
insertion of the trapezius   clavicle and scapula  
action of the trapezius   elevate, retract, depress scapula, extend neck  
origin of levator scapulae   C1-4 transverse processes  
insertion of levator scapulae   vertebral border of scapula  
action of the levator scapulae   scapular elevation  
origin of the serratus anterior   ribs 1-8  
insertion of the serratus anterior   Vertebral border of scapula  
action of the serratus anterior   Protract shoulder, upward rotation  
origin of pectoralis minor   ribs 3-5  
insertion of pectoralis minor   coracoid process/scapula  
action of pectoralis minor   depress shoulder, downward rotation of scapula  
origin of the deltoid   clavicle and scapula  
insertion of the deltoid   deltoid tuberosity  
action of the deltoid   shoulder abduction, flexion/extension, medial rotation  
origin of the supraspinatus   supraspinous fossa  
insertion of the supraspinatus   greater turbercle  
action of the supraspinatus   shoulder abduction  
origin of the infraspinatus   infraspinous fossa  
insertion of the infraspinatus   greater tubercle  
action of the infraspinatus   shoulder lateral rotation  
origin of the teres minor   lateral border of scapula  
insertion of the teres minor   greater tubercle  
action of the teres minor   shoulder lateral rotation  
origin of subscapularis   Subscapular fossa  
insertion of subscapularis   Lesser tubercle  
action of subscapularis   Shoulder medial rotation  
origin of latissimus dorsi   Inferior T and all L vertebrae, ribs 8-12  
insertion of latissimus dorsi   Intertubercular sulcus  
action of of latissimus dorsi   Shoulder extension, adduction, medial rotation  
origin of teres major   Scapula  
insertion of teres major   Intertubercular sulcus of humerus  
action of teres major   Shoulder extension, adduction, medial rotation  
origin of Pectoralis major   Clavicle, sternum, ribs 2-6  
insertion of Pectoralis major   Greater tubercle, intertubercular sulcus  
action of Pectoralis major   Shoulder flexion, adduction, medial rotation  
origin of biceps brachii   Long head: supraglenoid tubercle Short head: coracoid process  
insertion of biceps brachii   Radial tuberosity  
action of biceps brachii   Shoulder and elbow flexion  
origin of triceps brachii   Long head: superior humerus Lateral head: posterior humerus Medial head: posterior humerus  
insertion of triceps brachii   olecranon of ulna  
action of triceps brachii   shoulder and elbow extension; shoulder adduction  
origin of Brachialis   distal humerus  
insertion of Brachialis   trochlea or coronoid process of ulna  
action of Brachialis   Elbow flexion  
origin of Brachioradialis   lateral epicondyle of humerus  
insertion of of Brachioradialis   styloid process of radius  
action of Brachioradialis   elbow flexion  
origin of coracobrachialis   coracoid process of scapula  
insertion of coracobrachialis   medial humerus  
action of coracobrachialis   shoulder flexion, adduction  
origin of Flexor carpi radialis   Medial epicondyle of humerus  
insertion of of Flexor carpi radialis   Metacarpal  
action of Flexor carpi radialis   Wrist flexion, abduction  
origin of Flexor carpi ulnaris   Medial epicondyle of humerus  
insertion of Flexor carpi ulnaris   Carpals and metacarpals  
action of Flexor carpi ulnaris   Wrist flexion and adduction  
origin of Pronator quadratus   Distal ulna  
insertion of Pronator quadratus   Distal radius  
action of Pronator quadratus   Forearm pronation  
origin of Palmaris longus   Medial epicondyle of humerus  
insertion of Palmaris longus   Palm aponeurosis  
action of Palmaris longus   Wrist flexion  
origin of Extensor carpi radialis longus   supracondyler ridge of humerus  
insertion of Extensor carpi radialis longus   2nd metacarpal  
action of Extensor carpi radialis longus   Wrist extension, adduction  
origin of Gluteus medius   Ilium and gluteal lines  
insertion of Gluteus medius   Greater trochanter of femur  
action of Gluteus medius   Hip abduction, medial rotation  
origin of Psoas major   T12 – L5  
insertion of Psoas major   Lesser trochanter of femur  
action of Psoas major   Hip flexion  
origin of Tensor fasciae latae   Iliac crest and spine  
insertion of Tensor fasciae latae   Proximal lateral tibia via iliotibial tract  
action of Tensor fasciae latae   Hip flexion, medial rotation  
origin of Rectus femoris   Iliac spine  
insertion of Rectus femoris   Tibial tuberosity  
action of Rectus femoris   Hip flexion, knee extension  
origin of Vastus lateralis   Greater trochanter, linea aspera  
insertion of Vastus lateralis   Tibial tuberosity  
action of Vastus lateralis   Knee extension  
origin of vastus medialis   linea aspera  
insertion of vastus medialis   Tibial tuberosity  
action of vastus medialis   Knee extension  
origin of Vastus intermedius   Anterior and lateral femoral surface  
insertion of Vastus intermedius   Tibial tuberosity  
action of Vastus intermedius   Knee extension  
origin of Sartorius   iliac spine  
insertion of Sartorius   medial tibia  
action of Sartorius   lateral rotation, knee flexion  
origin of Adductor longus   Ramus of pubis  
insertion of Adductor longus   Linea aspera of femur  
action of Adductor longus   Adduction, flexion and medial rotation of hip  
origin of Adductor magnus   Ramus of pubis  
insertion of Adductor magnus   Linea aspera of femur  
action of Adductor magnus   Adduction, flexion, medial, & lateral rotation of hip  
origin of Gracilis   Pubic ramus  
insertion of Gracilis   Medial tibia  
action of Gracilis   Hip adduction, medial rotation  
origin of Pectineus   Ramus of pubis  
insertion of Pectineus   Lessor trochanter  
action of Pectineus   Adduction and medial rotation of hip  
origin of Biceps femoris   Long head: ischial tuberosity Short head: linea aspera  
insertion of Biceps femoris   Lateral tibia and fibula  
action of Biceps femoris   Hip extension, knee flexion  
origin of Semimembranosus   Ischial tuberosity  
insertion of Semimembranosus   Medial condyle of tibia  
action of Semimembranosus   Hip extension, knee flexion, medial rotation  
origin of Semitendinosus   Ischial tuberosity  
insertion of Semitendinosus   Medial condyle of tibia  
action of Semitendinosus   Hip extension, knee flexion, medial rotation  
origin of Tibialis anterior   lateral tibia  
insertion of Tibialis anterior   1st metatarsal and medial cuneiform  
action of Tibialis anterior   Ankle dorsiflexion; inversion  
orgin of Extensor digitorum longus   Lateral tibia and fibula  
insertion of Extensor digitorum longus   Middle and distal phalanges 2-5  
action of Extensor digitorum longus   IP extension  
origin of Peroneus (fibularis) longus   Lateral tibia and fibula  
insertion of Peroneus (fibularis) longus   1st metatarsal and medial cuneiform  
action of Peroneus (fibularis) longus   Plantarflexion; intertarsal eversion  
origin of Gastrocnemius   Condyles of femur  
insertion of Gastrocnemius   Calcaneus by way of calcaneal tendon  
action of Gastrocnemius   Plantarflexion and inversion  
origin of soleus   Head of fibula, medial tibia  
insertion of soleus   Calcaneus by way of calcaneal tendon  
action of soleus   plantarflexion  
origin of Internal intercostals   Superior border of rib below  
insertion of Internal intercostals   Inferior border of rib above  
action of Internal intercostals   Depress ribs  
origin of External Intercostals   Inferior border of rib above  
insertion of External Intercostals   Superior border of rib above  
action of External Intercostals   Elevate ribs  
origin of Diaphragm   Xiphoid process, costal cartilage ribs 6-12, lumbar vertebrae  
insertion of Diaphragm   Central tendon  
action of Diaphragm   Expand thoracic cavity  
origin of Rectus abdominis   Pubic bone  
insertion of Rectus abdominis   Cartilage ribs 5-7, xiphoid process  
action of Rectus abdominis   Flex vertebral column, depress ribs, compress abdomen  
origin of External abdominal Oblique   Ribs 5-12  
insertion of External abdominal Oblique   Iliac crest, linea alba  
action of External abdominal Oblique   Flex vertebral column, depress ribs, compress abdomen  
origin of Transversus abdominis   Cartilage ribs 6-12, iliac crest, thoracolumbar fascia  
insertion of Transversus abdominis   Linea abla, pubis  
action of Transversus abdominis   Compress abdomen  
origin of Orbicularis oculi   Medial orbit  
insertion of Orbicularis oculi   Eyelid skin  
action of Orbicularis oculi   Close eye  
origin of Orbicularis oris   Maxilla and mandible  
insertion of Orbicularis oris   Lips  
action of Orbicularis oris   Compress, purse lips  
origin of Buccinator   Alveolar process of maxilla and mandible  
insertion of Buccinator   Orbicularis oris  
action of Buccinator   compress cheeks  
origin of Zygomaticus major & minor   Zygomatic  
insertion of Zygomaticus major & minor   Angle of mouth, upper lip  
action of Zygomaticus major & minor   Draw corner of mouth up, angle  
origin of Temporalis   Temporal bone  
insertion of Temporalis   Coronoid process  
action of Temporalis   mastication  
origin of Occipitofrontalis   Galea aponeurotica  
insertion of Occipitofrontalis   Skin of eyebrows, nose, occipital bone  
action of Occipitofrontalis   Raise eyebrows, wrinkle forehead skin  
origin of Platysma   2nd rib and scapula  
insertion of Platysma   Mandible  
action of Platysma   Tense skin of neck, depress mandible  
origin of Masseter   Zygomatic arch  
insertion of Masseter   Ramus of mandible  
action of Masseter   mastication  
origin of Sternohyoid   Clavicle and manubrium  
insertion of Sternohyoid   Hyoid  
action of Sternohyoid   Depress larynx and hyoid  
origin of Stylohyoid   styloid process  
insertion of Stylohyoid   hyoid  
action of Stylohyoid   elevate hyoid  
origin of Sternocleidomastoid   Sternum, clavicle  
insertion of Sternocleidomastoid   Mastoid process (temporal)  
bilateral action of Sternocleidomastoid   flex neck  
unilateral action of Sternocleidomastoid   rotate head to opposite side  
origin of Digastric   Chin, mastoid process  
insertion of Digastric   Hyoid  
action of Digastric   Elevate larynx, depress mandible  
origin of Mylohyoid   Mandible  
insertion of Mylohyoid   hyoid  
action of Mylohyoid   Elevate oral floor, depress mandible  
origin of Sternothyroid   Sternum  
insertion of Sternothyroid   Thyroid cartilage (larynx)  
action of Sternothyroid   Depress larynx and hyoid  
origin of extensor carpi ulnaris   lateral epicondyle of humerus  
insertion of extensor carpi ulnaris   5th metacarpal  
action of extensor carpi ulnaris   wrist extension, adduction  
gluteus maximus origin   iliac crest, sacrum, coccyx  
gluteus maxiumus insertion   iliotibial tract, gluteal tuberosity  
gluteus maximus action   hip extension, lateral rotation  
origin of gluteus minimus   external inferior surface of ilium  
insertion of gluteus minimus   greater trochanter of femur  
action of gluteus minimus   abduct; medially rotates thigh  


   





 
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