Notes #2

9.8: Major Skeletal Muscles Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Frontalis Orbicularis oculi Zygomaticus Masseter Orbicularis oris Trapezius Sternocleido- mastoid Deltoid Pectoralis major Serratus anterior Biceps brachii Brachialis External oblique Brachioradialis Rectus abdominis Tensor fasciae latae Sartorius Rectus femoris Gracilis Adductor longus Vastus medialis Vastus lateralis Fibularis longus Gastrocnemius Tibialis anterior Soleus Extensor digitorum longus

Major Skeletal Muscles Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Temporalis Occipitalis Sternocleidomastoid Trapezius Deltoid Teres minor Infraspinatus Teres major Triceps brachii Brachialis Rhomboid Latissimus dorsi External oblique Gluteus medius Gluteus maximus Adductor magnus Biceps femoris Gracilis Semitendinosus Semimembranosus Vastus lateralis Sartorius Gastrocnemius Fibularis longus Calcaneal tendon Soleus

Muscles of Facial Expression

Muscles of Mastication

Muscles of Facial Expression and Mastication Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Epicranial aponeurosis Frontalis Epicranius Occipitalis Temporalis Orbicularis oculi Zygomaticus major Zygomaticus minor Masseter Buccinator Sternocleidomastoid Orbicularis oris Platysma (a) Temporalis Lateral pterygoid Medial pterygoid Buccinator (b) (c)

Muscles That Move the Head and Vertebral Column

Muscles That Move the Head and Vertebral Column Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Splenius capitis (cut) Longissimus capitis Semispinalis capitis Spinalis capitis Splenius capitis Spinalis cervicis Semispinalis capitis (cut) Longissimus cervicis Iliocostalis cervicis Iliocostalis thoracis Longissimus thoracis Spinalis thoracis Iliocostalis lumborum Quadratus lumborum

Muscles That Move the Pectoral Girdle

Muscles That Move the Pectoral Girdle Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Trapezius Levator scapulae Supraspinatus Deltoid Infraspinatus Teres minor Teres major Rhomboid minor Rhomboid major Latissimus dorsi (a) Rhomboid minor Trapezius Deltoid Rhomboid major Latissimus dorsi (b) (c) (d)

Muscles That Move the Arm

Muscles That Move the Arm Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Trapezius Sternocleidomastoid Pectoralis minor Deltoid Internal intercostal Pectoralis major External intercostal Serratus anterior Rectus abdominis Linea alba (band of connective tissue) Internal oblique External oblique Transversus abdominis Aponeurosis of external oblique

Muscles That Move the Arm Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Levator scapulae Supraspinatus Spine of scapula Deltoid Infraspinatus Teres minor Teres major Long head of triceps brachii Lateral head of triceps brachii (a) Levator scapulae Supraspinatus Infraspinatus Teres minor Teres major Triceps brachii (b) (c) (d)

Muscles That Move the Forearm

Muscles That Move the Forearm Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Trapezius Clavicle Subscapularis Deltoid Coracobrachialis Medial border of scapula Short head of biceps brachii Long head of biceps brachii Brachialis (a) Subscapularis Coracobrachialis Biceps brachii (short and long heads) Brachialis (b) (c) (d)

Muscles That Move the Forearm Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Biceps brachii Brachialis Supinator Pronator teres Brachioradialis Brachioradialis Extensor carpi radialis longus Flexor carpi radialis Flexor carpi ulnaris Palmaris longus Flexor carpi ulnaris Flexor digitorum superficialis Pronator quadratus Flexor retinaculum (a) (b) Pronator teres Flexor digitorum superficialis Flexor carpi radialis Pronator quadratus (c) (d) (e)

Cross Section of the Forearm Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Abductor pollicis longus m. Extensor digitorum m. Flexor pollicis longus m. Extensor carpi ulnaris m. Radius Extensor pollicis longus m. Extensor carpi radialis brevis m. Ulna Extensor carpi radialis longus m. Flexor digitorum profundus m. Pronator teres m. Ulnar n. Plane of section Brachioradialis m. Ulnar a. Radial n. Flexor carpi ulnaris m. Radial a. Median n. Flexor carpi radialis m. Flexor digitorum superficialis m. Anterior Palmaris longus m.

Muscles That Move the Hand Flexors (anterior) and extensors (posterior)

Muscles That Move the Hand Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Triceps brachii Brachioradialis Extensor carpi radialis longus Flexor carpi ulnaris Extensor carpi ulnaris Extensor carpi radialis brevis Extensor digitorum Extensor carpi radialis longusand brevis Extensor retinaculum Extensor carpi ulnaris Extensor digitorum (a) (b) (c)