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SKELETAL MUSCLES
a&p
| Question | Answer |
|---|---|
| Frontalis | flat muscle that covers the forehead. Raises the eyebrows, gives a surprised look. |
| Orbicularis oculi | circular muscle around the eyes; causes blinking, winking squinting. |
| Orbicularis oris | circular muscle around the mouth; kissing muscle; closes & purses the lips. |
| Buccinator | horizontal check muscle; whistling muscle, helps w/ chewing, trumpeter’s muscle. |
| Zygomaticus | Extends the corner of the mouth to the cheekbone; smiling muscle. |
| Temporalis | Flat shaped muscle over temporal bone; closes the jaw |
| Masseter | cover the lateral part of the lower jaw; closes the jaw |
| Sternocleidomastoid | Extends along the side of the neck; extends obliquely from the sternum & clavicle to the mastoid process of the temporal bone. Flexes and rotates the head “praying muscle” |
| Trapezius | Large triangular muscle on the posterior neck and upper back & the shoulders. Extends the head back, shrugs the shoulders. |
| External Intercostals | intercostals spaces between the ribs. Enlarges the thoracic cavity |
| Internal intercostals | intercostals spaces between the ribs. Decreases thoracic breathing w/ forced exhalation. |
| Diaphragm | Dome shaped separates the thoracic and abdominal cavities; chief muscle of inspiration |
| Muscles of the abdominal wall | External oblique, rectus abdominis, internal oblique- Compresses the abdomen also flexes the vertebral column. |
| Trapezius | Muscles that move the Shoulder and Upper Arm |
| Serratus anterior | forms the upper sides of the chest wall below axilla. Aids in raising the arms. |
| Pectoralis major | large muscle that covers upper anterior chest. Adducts & flexes upper arm across the chest. |
| Latissimus dorsi | large broad muscle on mid & lower back. Adducts & rotates the arm behind the back; swimmers muscle. |
| Deltoid | thick muscle that covers the shoulder joint. Abducts arm in a scarecrow position. |
| Rotator cuff muscles | a group of 4 muscles attaching the humerus to the scapula. Rotates the arm at the shoulder. |
| Biceps Brachii | major muscle on the anterior surface of the upper arm. Flexes and supinates the forearm. Allows us to pose and “make a muscle” |
| Triceps Brachii | posterior surface of upper arm. Extends the forearm; boxers arm. |
| Brachialis | deep to the biceps brachii; flexes forearm. |
| Brachioradialis | muscles of the forearm; flexes forearm. |
| Gluteus maximus | largest most superficial of the gluteal muscles; extends the thigh, forms the buttocks, muscle for sitting & climbing stairs. |
| Gluteus medius | thick muscle partly behind and superior to the gluteus maximus. |
| Adductor longus & gracilis | medial inner thigh; adducts the thigh |
| Illiopsoas | located on anterior surface of groin. Flexes the thigh. |
| Quadriceps femoris | located on the anterior & lateral surface of the thigh. Extends the leg & inserts in the tibia.(vastus lateralis |
| Sartorius | long muscle that crosses obliquely over the anterior thigh; allows you to sit in crossed leg position |
| Hamstrings | (biceps femoris, semitendinosus) located on posterior surface of the thigh; these muscles attach to the tibia & fibula. Flexes the leg; extends the thigh. |
| Tibialis anterior | Anterior leg; dorsiflexes the foot, inversion of the foot |
| Gastrocnemius | Posterior surface of the leg & the muscle that forms the calf; plantar flexion of the foot; toe- dancer muscle |
| Soleus | posterior surface of the leg; plantar flexion of the foot. |
Created by:
w3ndy
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