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A&P I muscles
A&P I muscles and functions
| Question | Answer |
|---|---|
| Orbicularis Oculi | Closes the eyes |
| Zygomaticus | Raises lateral corners of the mouth (smiles) |
| Orbicularis Oris | Closes the mouth |
| Masseter | Closes the jaw & elevates the mandible |
| Platysma | Tension of skin of the neck |
| Sternocleidomastoid | Flexes and laterally rotates the head |
| Pectoralis Major | Adducts arm; medially rotates arm |
| Pectoralis Minor | Draws the scapula foward and downward |
| Deltoid | Arm abduction |
| Internal intercostals | Depresses the rib cage and draws ribs together |
| External intercostals | Elevates the rib cage and draws ribs together |
| Rectus abdominis | Flexes and rotates the lumbar region of the vertebral column |
| External obliques | Flexes the vertebral column and compresses the abdominal wall |
| Trapezius | Stabilizes, raises, retracts and rotates the scapula |
| Latissimus Dorsi | Extends and adducts arm; medially rotates arm at shoulder |
| Gluteus Maximus | Extends the thigh |
| Triceps brachii | Extends the forearm |
| Biceps brachii | Flexes the elbow joint and supinates forearm |
| Flexor digitorum profundus | Flexes the distal interphalangeal joints |
| Extensor digitorum | Finger extension |
| Sartorius | Flexes, abducts and laterally rotates thigh; flexes the knee |
| Quadriceps femoris | Knee extension |
| Rectus femoris | Extends knee and flexes thigh at hip |
| Vastus lateralis | Extends knee and stabilizes knee |
| Vastus medialis | Extends knee |
| Biceps femoris | Extends thigh and flexes knee |
| Gastrocnemius | Plantar flexes foot |
| Tibialis posterior | foot inversion |
Created by:
jpalao
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