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A&P Muscles1
| Muscle | Function | Origin | |
|---|---|---|---|
| Buccinator | Retracts angle of mouth; flattens cheek | ||
| Fronatalis- (occipitofronatlis) | Moves scalp; elevates eyebrows | ||
| Masseter | Elevates and protracts mandible; involved in excursion | ||
| Occipitalis | Elevation of Eyebrows | ||
| Orbicularis oculi | closes eyelids | ||
| Orbicularis oris | closes lips | ||
| Platysma | Depresses lower lip; wrinkles skin of neck and upper chest | Deltoid & Pectoralis major | Mandible |
| Sternocleidomastoid | "One Contracting alone:laterally flexes head and neck to same side and rotates the head and neck to opposite side Both Contracting together: flexes neck" | Manubrium & clavicle | Mastoid process |
| Temporalis | Elevates and protracts mandible; involved in excursion | ||
| Zygomaticus Major | Elevation of the corner of mouth (smile) | ||
| Diaphragm | Inspiration; depresses floor of thorax | ||
| External Intercostals | Inspiration; elevates ribs | ||
| External Oblique | Flexes and rotates vertebral column; compresses abdomen; depresses thorax | ||
| Internal Oblique | Flexes and rotates vertebral column; compresses abdomen; depresses thorax | ||
| Pectoralis Major | Flexes shoulder; adducts and medially rotates arm; extends shoulder from flexed position | Clavicle | Humerus |
| Pectoralis Minor | depresses scapula or elevates ribs | ||
| Rectus abdominus | flexes and rotates vertebral column; compresses abdomen | ||
| Serratus Anterior | Rotates and protracts scapulat; elevates ribs | ||
| Transverse abdominus | Compresses abdomen | ||
| Adductor Longus | Adducts and laterally rotates thigh; flexes hip | ||
| Adductor Magnus | "Adductor part: adducts thigh & flexes hip Hamstring part: extends hip" | ||
| Biceps Femoris | Flexes knee; laterally rotates leg; extends hip | Femur | Fibula |
| Fibularis longus | Everts and plantar flexes foot | fibula | first metatarsal bone and cuniform |
| Gastrocnemius | plantar flexes foot; flexes knee | Calcaneus | femur |
| Gluteus maximus | extends hip; abducts and laterally rotates thigh | illium, sacrum and coccyx | femur |
| Gluteus medius | abducts and medially rotates thigh;tilts pevis toward supported side | ||
| Gracilis | Adduction of thigh; flexion of leg | ||
| Iliopsoas | flexes hip | ||
| Rectus Femoris | Extension of leg; flexion of thigh; Extensor digitorum longus | Anterior inferior iliac spine | tibial tuberosity |
| Sartorius | flexes hip and knee; laterally rotates and abducts thight; medially rotates leg | Anterior Superior iliac spine | tibial tuberosity |
| Semitendinosous | flexes knee; medially rotates leg; extends hip | ||
| Semimembranosous | Flexes knee; medially rotates leg; tenses capsule of knee joint; extends hip | ||
| Soleus | plantar flexes foot | ||
| Tensor Fascia latae | Flexes Hip; Abducts and medially rotates thigh; stabilizes femor on tibia when standing | ||
| Tibialis Anterior | Dorsiflexes and inverts foot | Tibia | Cuniform and first metatarsal bone |
| Vastus intermedius | Extends knee | ||
| Vastus Lateralis | Extends knee | ||
| Vastus medialis | Extends knee | ||
| Biceps Brachii* | Flexes shoulder and elbow; supinates forearm and hand | scapula | radial tuberosity |
| Brachialis | Flexes elbow | Humerus | Ulna |
| Brachioradialis | Flexes elbow | Humerus | Radius |
| Deltoid | Flexes and extends shoulder; abducts, medially and laterally rotates arm | ||
| Infraspinatus | Laterally rotates arm; holds head of humerus in place | Scapula | Humerus |
| Latissimus Dorsi | Adducts and medially rotates arm; extends shoulder | ||
| Palmaris Longus | Flexion of wrist (weak); Tense palmar aponeurosis | ||
| Subscapularis | medially rotates arm; holds head of humerus in place | ||
| Supraspinatus | Abducts arm; holds head of humerus in place | Supraspinous Fossa | Humerus |
| Teres major | Extends shoulder; adducts and medially rotates arm | Scapula | Humerus |
| Teres minor | Laterally rotates and adducts arm; holds head of humerus in place | ||
| Trapazius | Elevates, depresses, retracts, rotates and fixes scapula; extends neck | ||
| Triceps Brachii | Extension of forearm; extension of arm (long head) | Humerus | Ulna |
Created by:
lynette.thorpe
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