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origin and insertion
| Question | Answer |
|---|---|
| Muscles that move the pectoral girdle: | Trapezius and pectoralis minor |
| muscles that move the upper arm: | pectoralis major, teres major, latissimus dorsi, deltoid, and teres minor. |
| muscles that move the forearm: | biceps brachii, brachialis, brachioradialis, and triceps brachii. |
| muscles of mastication: | lateral pterygoid, medial pterygoid, masseter, temporalis. |
| muscles that move the head: | sternocleidomastoid (SCM), splenius capitus. |
| muscles that move the trunk: | external oblique, internal oblique, transversus abdominus. |
| muscles of the pelvic girdle (that move the thigh): | gluteus maximus (largest muscle in the body), gluteus medius, gluteus minimus. |
| muscles that extend the calf at the knee (quadriceps): | rectus femoris, vastus lateralis, vastus intermedius, vastus medialis. |
| Muscles that flex the calf at the knee (hamstrings): | hamstring (biceps femoris, semimembranosis, semitendinosis), plus the sartorius (longest muscle in the body). |
| muscles that move the ankle, foot, and toes: | peroneus longus, gastrocnemius. |
| teres major OIA (origin, insertion, abducts): | O - scapula, I- humerus, A-adducts, extends and medially rotates the arm. |
| latissimus dorsi OIA: | O-vertebrae (thoracic and sacral) and pelvis (ilium), I-humerus, A-extends, adducts, medially rotates arm and pulls shoulder downward. |
| deltoid OIA: | O-clavicle, acromion process and scapula, I-humerus (deltoid tuberosity), A-abducts, rotates, extends arm. |
| biceps brachii OIA: | O-scapula, I-radius, A-flex the forearm. |
| brachialis OIA: | O-humerus, I-ulna, A-flex the forearm. |
| brachioradialis OIA: | O-humerus, I-radius, A-flex the forearm. |
| Platysma OIA: | O-fascia over pectoralis major and deltoid muscles, I-mandible and skin of chin and cheek, A-depresses the jaw and tightens the skin of the neck. |
| pterygoideus OIA: | O-sphenoid bone (pterygoid plate), I-mandible, A-opens the jaw and helps move them sideways. |
| masseter OIA: | O-zygomatic arch, I-mandible, A-closes jaw. |
| sternocleidomastoideus (SCM) OIA: | O-sternum and clavicle, I-temporal bone (mastoid process), A-pulls head to one side and down and flexes vertebral column. |
| gluteus maximus OIA: | O-ilium, sacrum, coccyx, I-femur and fascia of thigh, A-extends leg |
| glutues medius OIA: | O-ilium, I-femur, A-abduct and medially rotates thigh. |
| glutues minimus OIA: | O-ilium, I-femur, A-abduct and medially rotates thigh. |
| rectus femoris OIA: | O-ilium, I-tibia (via patella and patellar ligament), A-extends leg and flexes thigh. |
| vastus intermedius OIA: | O-femur, I-tibia, A-extend leg at knee. |
| vastus lateralis OIA: | O-femur, I-tibia, A-extend leg at knee. |
| vastus medialus OIA: | O-femur, I-tibia, A-extend leg at knee. |
| semimembranosus OIA: | O-pelvis (ischium), I-tibia, A-flex leg and extend thigh. |
| Biceps femoris OIA: | O-pelvis (ischium) and femur, I-fibula and tibia, A-flexes leg and rotates it laterally. |
| semitendinosus OIA: | O-pelvis (ischium), I-tibia, A-flex leg and extend thigh. |
| sartorius OIA: | O-pelvis (ilium), I-tibia, A-flexes thigh and leg. |
| peroneus longus OIA: | O-fibula, I-1st metarsal and medial cuneiform, A-flex and evert foot. |
| gastrocnemius OIA: | O-femur, I-calcaneus (via achilles tendon), A-flex leg and foot. |
| Muscles of facial expression | zygomaticus, orbicularis oris, orbicularis oculi, playtsma. |