“Movers and Shakers”

A useful website www.rci.rutgers.edu/.../APFallLect15.html

Head and Neck Muscle

Muscles of Facial Expression Name of the Muscle Action/s Frontalis Wrinkles the forehead Elevates eyebrows Corrugator supercilii Draws eyebrows to midline Orbicularis oculi Closes the eye Buccinator Compresses cheek

Muscles of Facial Expression Name of the Muscle Action/s Zygomaticus Elevates corner of the mouth Risorius Draws corner of mouth laterally Mentalis Protrudes lower lip Platysma Depresses mandible and lower lip

Muscles of Facial Expressions Frontalis

Corrugator supercilii

Orbicularis oculi

Orbicularis oris

Buccinator

Zygomaticus

Risorius

Mentalis

Platysma

Bell’s Palsy (Facial Paralysis)

Muscles of Mastication Name of the Muscle Action/s Masseter Elevates the mandible Temporalis

Muscles of Mastication

Posterior Muscles of the Neck Name of the Muscle Action/s Sternocleidomastoid Rotates head, flexes neck Trapezius Moves shoulder: adducts and elevates

Posterior Muscles of the Neck Sternocleidomastoid Trapezius

Sternocleidomastoid

Suprahyoid Muscles Name of the Muscle Action/s Diagastric Opens mouth, elevates hyoid Mylohyoid Elevates hyoid and floor of mouth Geniohyoid Elevates hyoid and protracts the tongue Genioglossus Protracts the tongue Styloglossus Retracts and elevates tongue Stylohyoid Retracts and elevates tongue

Suprahyoid Muscles Digastric

Mylohyoid

Infrahyoid Muscles Name of the Muscle Action/s Sternohyoid Depresses hyoid Sternothyroid Depresses thyroid cartilage Thyohyoid Depresses hyoid bone, elevates larynx

Infrahyoid Muscles

Muscles of the Body wall

Muscles of the Thorax

Muscles of Respiration Name of the Muscle Action/s External intercostals Elevate ribs (Inspiration) Internal intercostals Depress ribs (Expiration) Diaphragm Chief muscle of inspiration

Muscles of Respiration

Abdominal Wall Muscles Name of the Muscle Action/s Rectus abdominis Flexes vertebral column, compresses abdomen External oblique abdominis Compresses abdomen, lateral trunk rotation Internal oblique abdominis Transversus abdominis

Abdominal Wall Muscles

Muscles of the Posterior Thorax Name of the Muscle Action/s Serratus anterior Pulls scapula forward and down Levator scapulae Elevates scapula Rhomboideus major and minor Adduct scapula Trapezius Moves shoulder: adducts and elevates

Muscles of the Posterior Thorax

Muscles of the Posterior Thorax

Muscles of the Shoulder Name of the Muscle Action/s Pectoralis major Flexes, adducts, and rotates arm Pectoralis minor Pulls scapula forward and down Deltoid Abducts arm

Muscles of the Shoulder Name of the Muscle Action/s Lattisimus dorsi Extends, adducts, and rotates arm medially Teres major Teres minor Rotates arm medially

Muscles of the Shoulder Deltoid

Muscles of the Arm Name of the Muscle Action/s Biceps brachii Flexes forearm Brachialis Brachioradialis

Muscles of the Forearm Name of the Muscle Action/s Pronator teres Pronates forearm Supinator Supinates forearm Triceps bracii Extends forearm

Muscles of the Arm

Biceps brachii Brachialis

Supraspinatus Infraspinatus Teres minor Triceps brachii

Muscles of the forearm Name of the Muscle Action/s Flexor carpi radialis Flexes and abducts the wrist Flexor carpi ulnaris Flexes and adducts the wrist Flexor digitorum superficialis and profundus Flex the wrist and digits

Muscles of the forearm Name of the Muscle Action/s Extensor carpi radialis longus Extends wrist Extensor carpi ulnaris Extensor digitorum Extends wrist and digits

Muscles of the Forearm

Muscles of the Hip

Muscles of the Gluteal Region Name of the Muscle Action/s Gluteus maximus Extends and rotates thigh laterally Gluteus medius Abducts and rotates thigh medially Gluteus minimus Tensor fasciae latae

Muscles of the Gluteal Region

Adductors Name of the Muscle Action/s Adductor longus Flexes, adducts, and rotates thigh medially Adductor brevis Flexes, adducts, and rotates thigh Adductor magnus

Adductors

Muscles of the Thigh

Flexors (Hamstrings) Name of the Muscle Action/s Gracilis Flexes leg and adducts thigh Sartorius Flexes leg and thigh, and abducts and rotates thigh Biceps femoris Flexes leg and extends and adducts thigh Semimembranosus Flexes leg and extends and adducts thigh, medially rotates thigh Semitendinosus

Flexors (Hamstrings)

Extensors (Quadriceps) Name of the Muscle Action/s Rectus femoris Extend leg, and flex thigh Vastus medialis Extend leg Vastus lateralis Vastus intermedius

Extensors (Quadriceps)

Muscles of the Leg

Muscles that move the foot Name of the Muscle Action/s Gastrocnemius Planter flexes foot Soleus Peroneus longus Planter flexes and everts Peroneus brevis Peroneus tertius Dorsiflexes and everts Tibialis anterior Dorsiflexes and inverts

Muscles that move the foot

Muscles that move the toes Name of the Muscle Action/s Flexor digitorum longus Flexes the toes Extensor digitorum longus Extends the toes

Muscles that move the Toes

Got “Movements”

Quadriplegia due to Spinal cord injury

Paralysis

Myesthenia gravis