Advanced Biology Chapter 10

NECK MUSCLES A Sternocleidomastoid Sternocleidomastoid Flexes head Flexes head

NECK MUSCLES B Trapezius Trapezius Stabilizes, raises, retracts and rotates scapula Stabilizes, raises, retracts and rotates scapula

NECK MUSCLES N Occipitalis Occipitalis Pulls scalp posteriorly Pulls scalp posteriorly

SHOULDER MUSCLES C Deltoid Deltoid Arm abduction Arm abduction

SHOULDER MUSCLES O Infrapinatus Infrapinatus Rotator Cuff Muscle; Helps hold head of humerus in glenoid cavity. Rotates humerus laterally Rotator Cuff Muscle; Helps hold head of humerus in glenoid cavity. Rotates humerus laterally

SHOULDER MUSCLES P Teres Major Teres Major Extends, medially rotates and adducts humerus Extends, medially rotates and adducts humerus

BACK MUSCLE D Latissimus Dorsi Latissimus Dorsi Prime mover of arm extension. Powerful arm adductor. Prime mover of arm extension. Powerful arm adductor.

HIP MUSCLES E Gluteus Medius Gluteus Medius Abducts and medially rotates thigh – walking Abducts and medially rotates thigh – walking

HIP MUSCLES F Gluteus Maximus Gluteus Maximus Major extensor of thigh Major extensor of thigh

THIGH MUSCLES G Biceps Femoris Biceps Femoris Extends thigh, flexes knee Extends thigh, flexes knee

THIGH MUSCLES H Semitendinosus Semitendinosus Extends thigh at hip; flexes knee; medially rotates leg Extends thigh at hip; flexes knee; medially rotates leg

THIGH MUSCLES I Semimembranosus Semimembranosus Deep to semitendinosus; extends thigh, flexes knee, medially rotates leg Deep to semitendinosus; extends thigh, flexes knee, medially rotates leg

ARM MUSCLES J Triceps Brachii Triceps Brachii Powerful forearm extender Powerful forearm extender

FOREARM MUSCLES Q Extensor Carpi Radialis longus Extensor Carpi Radialis longus Extends and abducts wrist Extends and abducts wrist

LEG MUSCLES K Gastrocnemius Gastrocnemius Plantar flexes foot when knee is extended, weak flexor of knee Plantar flexes foot when knee is extended, weak flexor of knee

LEG MUSCLES L Soleus Soleus Plantar flexes ankle. Aids in walking Plantar flexes ankle. Aids in walking

LEG MUSCLES M Calcaneal Calcaneal Attachment of Gastrocnemius Attachment of Gastrocnemius