Lab 5: Muscle insertion and purpose review

Masseter purpose

Closes the jaw

Orbicularis oculi purpose

Closes the eyelids

Orbicularis oris purpose

Purses the lips

Sternocleidomastoid purpose

Neck flexion and rotation

Sternocleidomastoid origin

Medial clavicle and manubrium of sternum

Sternocleidomastoid insertion

Mastoid process of temporal bone

Pectoralis major purpose

Shoulder flexion

Pectoralis minor purpose

Depresses scapula

External intercostals purpose

Expands rib cage during inspiration

Internal intercostals purpose

Contracts ribcage during forced expiration

Diaphragm purpose

Inspiration

Internal and external oblique purpose

Trunk and lateral flexion and rotation

Rectus abdominis purpose

Trunk and lateral flexion and rotation

Iliopsoas purpose

Hip flexion

Tensor fasciae latae purpose

Hip flexion

Sartorius purpose

Hip flexion and external rotation

Vastus Medialis, Vastus Intermedius, Vastus Lateralis, Rectus Femoris purpose

extend the knee

Vastus Medialis, Vastus Intermedius, Vastus Lateralis, Rectus Femoris insertion

Tibial tuberosity via patellar tendon

Gracilis purpose

Adducts hip

Tibialis anterior purpose

Dorsiflexion of ankle

Erector spinae purpose

Back extension

Trapezius superior purpose

Elevate scapula

Trapezius middle purpose

retract scapula

Trapezius inferior purpose

Depress scapula

Supraspinatus, infraspinatus, teres minor, and subscapularis purpose

Stabilize shoulder

Teres major purpose

Extends shoulder

Deltoid purpose

Flexes, extends, and abducts shoulder

Biceps brachii

Flexes and supinates elbow

Triceps brachii

Extends elbow

Brachioradialis purpose

Flexes elbow

Extensor digitorum purpose

extends digits and wrist

Gluteus maximus prupose

Forceful hip extension

Glutues medius purpose

Hip abduction

Semitendinosus, semimembranosus, and biceps femoris purpose

knee flexion and hip extension

Gastrocnemius purpose

Plantar flexion of ankle

Soleus purpose

Plantar flexion of ankle

Gastrocnemius and soleus insertion

Insertion via Achilles tendon onto posterior calcaneus