Unit 2 Lab Study Guide PDF

Unit 2: Lab Study Guide Muscles Head (12) Epicranius = Frontalis and Occipitalis A broad, musculofibrous layer, which covers the whole of one side of the vertex of the skull, from the occipital bone to the eyebrow The Frontalis and occipitalis are connected by an intervening tendin...

Unit 2: Lab Study Guide Muscles Head (12) Epicranius = Frontalis and Occipitalis A broad, musculofibrous layer, which covers the whole of one side of the vertex of the skull, from the occipital bone to the eyebrow The Frontalis and occipitalis are connected by an intervening tendinous aponeurosis, the galea aponeurotica Frontalis: Origin Insertion Action Cranial aponeurosis Skin of eyebrows Raises eyebrows Occipitalis: Origin Insertion Action Occipital bone Sternocleidomastoid: Origin Insertion Action Sternum and Clavicle Mastoid process Head rotation Masseter: Origin Insertion Action Zygomatic arch and Angle of Mandible Closes jaw Maxilla Temporalis: Origin Insertion Action Temporal fossa Coronoid process of Closes jaw mandible Zygomaticus Major: Origin Insertion Action Zygomatic bone Smiling Orbicularis Oris: Origin Insertion Action Closes mouth Orbicularis Oculi: Origin Insertion Action Closes eyes ID only (4): Platysma Sternohyoid Mylohyoid Digastric Arm and Forearm (12) Supraspinatus: Origin Insertion Action Supraspinous fossa Greater tubercle Abduction of humerus Infraspinatus: Origin Insertion Action Infraspinous fossa Greater tubercle Lateral rotation Teres Major: (A only) Origin Insertion Action Posterior surface of Medial lip of the Medially rotates and the inferior angle and intertubercular sulcus adducts the humerus the lower part of the lateral border Teres Minor: (ID only) Origin Insertion Action Lateral border of Head of humerus Lateral rotation scapula Subscapularis: (A only) Origin Insertion Action Subscapular fossa Lesser tubercle Medial rotation Biceps Brachii: Origin Insertion Action Intertubercular sulcus Radial tubersoity Flexion and coracoid process Brachialis: Origin Insertion Action Anterior surface of Coronoid process of Flexion distal humerus the ulna Brachioradialis: Origin Insertion Action Lateral supracondylar Styloid process of Flexion ridge of humerus radius Triceps Brachii: Origin Insertion Action Posterior aspect of Olecranon process of extension head of humerus and ulna infraglenoid tubercle Supinator: (A only) Origin Insertion Action Supinate the forearm Pronator Teres: (A only) Origin Insertion Action Pronation of the forearm Pronator Quadatrus: (A only) Origin Insertion Action Pronation Wrist and Hand (9) Flexor Carpi Radialis: (O and A only) Origin Insertion Action Medial epicondyle Flexion of wrist Flexor Carpi Ulnaris: (O and A only) Origin Insertion Action Medial epicondyle Flexion of wrist Flexor Digitorium Superficialis: (O and A only) Origin Insertion Action Medial epicondyle Flexion of wrist Palmaris Longus: (A only) Origin Insertion Action Flexion of wrist Flexor Digitorium Profoundus: (A only) Origin Insertion Action Flexion of wrist Extensor Carpi Radialis Longus: (O and A only) Origin Insertion Action Lateral supracondylar Extends the wrist ridge of humerus Extensor Carpi Radialis Brevis: (O and A only) Origin Insertion Action Lateral epicondyle of Extends the wrist humerus Extensor Digitorum: (O and A only) Origin Insertion Action Lateral epicondyle of Extends the wrist humerus Extensor Carpi Ulnaris: (O and A only) Origin Insertion Action Lateral epicondyle of Extends the wrist humerus Shoulder & Trunk (15) Trapezius: Origin Insertion Action Occipital A continuous insertion Adduction of scapula Bone,ligamentum along acromion and nuchae, spines of C7 spine of scapula and and all thoracic lateral third of clavicle vertebrae Pectoralis Major: Origin Insertion Action Sternal end of Greater tubercle of Medially rotates the clavicle, sternum, humerus arm, adducts arm and cartilage of ribs and PM of arm flexion aponeurosis of external oblique muscle Pectoralis Minor (ID only) Deltoid: Origin Insertion Action Acromion and spine of Deltoid tuberosity Abduction of arm scapula, lateral third of clavicle Latissimus Dorsi: Origin Insertion Action Spinous process of Floor of Arm extension, thoracic and lumbar intertubercular sulcus adduction and medial vertebrae, iliac crest, of humerus rotation at shoulder and inferior angle of scapula Serratus Anterior (ID only) Origin Insertion Action By a series of muscle Entire anterior surface Rotates the scapula sips from ribs 1-8 (or of vertebral border of so that its inferior 9) scapula angle moves laterally and upward External Intercostal: (A only) Origin Insertion Action Inhalation Internal Intercostal: (A only) Origin Insertion Action Exhalation Rectus Abdominis: (A only) Origin Insertion Action Pubic crest and Xiphoid process and Flexion and rotation of symphysis costal cartilages of lumbar spine ribs 5-7 External Oblique: (A only) Origin Insertion Action Flex spine and compress abdominal wall, aids muscles of back in trunk rotation and lateral flexion Internal Oblique: (A only) Origin Insertion Action Flex spine and compress abdominal wall, aids muscles of back in trunk rotation and lateral flexion Transversus Abdominis: (A only) Origin Insertion Action Compression of abdominal wall ID only (3): Diaphragm Levator Scapulae Rhomboids Thigh (14) Gluteus Maximus: Origin Insertion Action Ilium, Sacrum and Femur and iliotibial extension Coccyx tract Gluteus Medius: Origin Insertion Action Ilium Greater trochanter extension Tensor Fascia Latae: Origin Insertion Action Anterior superior iliac Iliotibial tract Abduction of thigh spine Hamstrings (3) Semimembranosus: Origin Insertion Action Ischial tuberosity Tibia Flexes the knee Semitendinosus: Origin Insertion Action Ischial tuberosity Medial condyle of tibia Flexes the knee Biceps Femoris: Origin Insertion Action Ischial tuberosity Head of tibia and Flexes the knee fibula Quadriceps (4) Rectus Femoris: (I and A only) Origin Insertion Action Anterior inferior iliac Tibial tuberosity and Extends the knee spine and ilium patella Vastus Lateralis: (I and A only) Origin Insertion Action Greater trochanter Tibial Tuberosity and Extends the knee and lip of linea aspera patella Vastus Medialis: (I and A only) Origin Insertion Action Intertrochanteric line Tibial tuberosity and Extends the knee patella Vastus Intermedius: (I only) Origin Insertion Action Anterior and lateral Tibial tuberosity via Extends the knee surface of proximal the tendon of the femur shaft rectus femoris Sartorius: Origin Insertion Action Anterior superior iliac Medial aspect of Flexes, abducts and spine proximal tibia laterally rotates thigh Gracilis: (A only) Origin Insertion Action Inferior ramus and Medial surface of Adduction body of pubis and tibia, just inferior to its adjacent ischial ramus medial condyle Adductor Longus: (A only) Origin Insertion Action Pubis near pubic Linea aspera adduction symphysis Pectineus (ID only) Leg and Foot (7) Gastrocnemius: Origin Insertion Action Medial and lateral Calcaneus Plantar flexion condyle of femur Soleus: Origin Insertion Action Tibia and Fibula Calcaneus Plantar flexion Fibularis (Peroneus) Longus: (A only) Origin Insertion Action Head and upper Plantar flexion and portion of lateral side everts the foot of fibula Fibularis (Peroneus) Brevis: (A only) Origin Insertion Action Distal fibula shaft Plantar flexion and everts the foot Tibialis Anterior: (A only) Origin Insertion Action Lateral condyle and Dorsiflexion of the foot upper ⅔ of tibial shaft; interosseous membrane Extensor Digitorum Longus: (A only) Origin Insertion Action Dorsiflexion of the foot Flexor Digitorum longus: (A only) Origin Insertion Action Dorsiflexion of the foot