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46 Cards in this Set
- Front
- Back
Frontalis |
Elevates eyebrows, wrinkles skin of forehead |
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Diaphragm |
Forms floor of thoracic cavity, causes inspiration- when relaxed, air is forced out of lungs |
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Erector spinae |
Group of muscles that extend spine- holds body in upright posture |
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Transversus abdominis |
Compresses abdomen but does not flex lumbar spine |
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External abdominal oblique |
Compresses abdomen and flexes lower spine |
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Internal abdominal oblique |
Compresses abdomen and flexes lumbar spine |
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External intercostals |
Elevates ribs, expanding rib cage during inspiration |
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Internal intercostals |
Depresses ribs, compresses rib cage during forced expiration |
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External anal sphincter |
Closing opening to anus |
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Levator ani |
Group of muscles function together and tense floor of pelvis to support pelvic organs |
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Pectoralis minor |
Adults scapula, rotates it downward and pulls against ribs Origin- ribs 3 to 5 Insertion- coracoid process of scapula |
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Serratus anterior |
Abducts scapula and rotates upward (lifting arms) |
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Trapezius |
Adducts scapula and rotates up (lifting arms) |
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Rhomboidous major |
Adducts, elevates and rotates scapula downward |
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Pectoralis major |
Adducts, flexes and medially rotates humerus at shoulder Origin- clavicle, cartilage of ribs 2 to 6 and sternum Insertion- greater tubercle of humerus |
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Latissimus dorsi |
Adducts, extends and medically rotates humerus at shoulder |
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Deltoid |
Abducts, flexes, extends and rotates humerus at shoulder Origin- clavicle, acromial process and spine of scapula Insertion- deltoid tuberosity of humerus |
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Supraspinatus |
Assists deltoid in abducting humerus at shoulder |
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Infraspinatus |
Laterally rotates humerus at shoulder |
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Teres minor |
Laterally rotates and extends humerus at shoulder |
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Subscapularis |
Medically rotates arm at shoulder |
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Biceps brachii |
Flexes forearm at elbow and humerus at shoulder Origin- scapula Insertion- radial tuberosity of radius |
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Triceps brachii |
Extends forearm at elbow and extends humerus at shoulder Origin- scapula and humerus Insertion- olecranon process of ulna |
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Iliopsoas |
Flexes and laterally rotates femur at hip and flexes trunk at hip as when sitting up from supine position |
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Gluteus maximus |
Extends and laterally rotates femur at hip Origin- iliac crest and sacrum Insertion- linea aspera |
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Gluteus medius and gluteus minimus |
Abducts and medially rotates femur at hip |
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Adductor brevis, adductor longus, adductor magnus |
Adducts and flexes femur at hip Origin: pubis bone Insertion- linea aspera of femur |
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Tensor fascia latae |
Abducts and flexes femur at hip |
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Sartorius |
Flexes femur at hip, flexes and laterally rotates leg at knee (crossing legs) Origin- anterior illiac spine Insertion- tibia |
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Biceps femoris, semitendinosus, semimembranosus |
Together flex leg at knee and extend femur at hip |
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Gastrocnemius |
Plantar flexes foot at ankle and flexes leg at knee Origin- medial and lateral condyles of femur Insertion- calcaneous via calcaneal tendon (Achilles tendon) |
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Tibialis anterior |
Dorsiflexes & inverts foot at ankle |
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Fibularis longus |
Plantar flexes and everts foot at ankle |
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Rectus femoris |
Extends leg at knee when working with quadriceps femoris- when alone flexes femur at hip |
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Vastus lateralis |
Extends leg at knee when working with quadriceps femoris |
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Vastus medialis |
Extends leg at knee when working with quadriceps femoris |
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Vastus intermedius |
Extends leg at knee when working with quadriceps femoris |
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Rectus abdominus |
Flexes lumbar spine (sit ups) and go presses abdomen for pooping, peeing, and childbirth Origin- superior ramus of pubic bones and pubic symphysis Insertion- xiphoid process and inferior surfaces of costal cartilage |
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Sternocleidomastoid |
Together flex cervical spine (head to chest) if only one contracts, rotates head and neck to opposite side Origin- sternum and clavicle Insertion- mastoid process of temporal bone |
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Masseter |
Elevates mandible (chewing) Origin- maxilla and zygomatic arch Insertion- mandible |
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Temporalis |
Elevates and retracts mandible (chewing) Origin- temporal bone Insertion- coronoid process of mandible |
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Platysma |
Depresses angle of mouth (frowning) and depresses mandible |
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Buccinator |
Draws cheeks in against teeth (sucking, blowing, whistling) |
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Zygomaticus major |
Elevates angle of mouth upward and laterally (smiling) Origin- zygomatic bone Insertion- skin at angle of mouth |
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Orbicularis oris |
Closed lips |
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Orbicularis oculi |
Closes eyelids |