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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Created by:
Cabrini
on 2008-06-28