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SKELETAL MUSCLES

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QuestionAnswer
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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