List of Muscles and Function

[Pages:6]List of Muscles and Function

Region Facial

View Anterior/Oblique

Muscle Occipitofrontalis front belly Orbicularis oculi Orbicularis oris Zygomaticus minor/major Buccinator Depressor anguli oris

Function Raises eyebrows Closes eye Purses lips Elevates & retracts lip and mouth Compresses cheeks Depress corner of mouth

Facial

Lateral

Masseter Temporalis

Elevate mandible/close jaw Principle masticator Elevates jaw, masticator

Neck

Anterior

Anterior

deep section

Platysma Sternocleidomastoid

Omohyoid

Sternohyoid

Depress mandible, tense neck Flex neck together Rotate head to opposite side alone Depress hyoid & larynx

Depress hyoid & larynx

Abdomen

Anterior

deep section deep section deep section

Rectus abdominis External oblique Internal oblique Transversus abdominis Diaphragm

Vertebral flexion/compression Vertebral flexion/rotation/comp Vertebral flexion/rotation/comp Compress abdomen Quiet respiration

Shoulder Girdle

Posterior Anterior deep section

Trapezius Serratus anterior Rhomboid major/minor Pectoralis minor

Elev/depress/adduct/up.rotation Abduction, upward rotation Adduction, downward rotation Abduction, downward rotation

Shoulder Joint

Posterior

Anterior ribs removed Anterior Post/Lat/Ant

Latissimus dorsi

Adduct, inward rotation, extension

Teres major

Adduct, inward rotation, extension

*Supraspinatus

Abduction and stabilization

*Infraspinatus

Adduction, outward rotation

*Teres minor

Adduction, outward rotation

*Subscapularis

Adduction, inward rotation

*Above four comprise the Rotator Cuff

Pectoralis major

Flexion, inward rotation,

Coracobrachialis

Adduction, flexion

Biceps brachii

Flexion

Triceps brachii long head Extension

Deltoid all fibers Abduct, ant. fibers in.rot/flex post. fibers outrot/flex

Elbow Joint Anterior Posterior

Biceps brachii Brachialis Brachioradialis Triceps brachii

58

Flexion, supination of hand Flexion Flexion. Pro/supination to midpos. Extension

Region

View

Wrist & Hand Anterior

Posterior

Hip Joint

Anterior

deep section

Medial Posterior

Lateral Knee Joint Anterior

deep section

Posterior

Ankle Joint Anterior Lateral Posterior

Muscle

Function

Long Flexors

Flexor carpi radialis

Flexion of wrist and hand

Palmaris longus

Flexion of wrist and hand

Flexor carpi ulnaris

Flexion of wrist and hand

Long Extensors

Extensor carpi radialis long. Extension of wrist and hand

Extensor digitorum

Extension of wrist and hand

Extensor carpi ulnaris

Extension of wrist and hand

Iliopsoas Iliacus Psoas major

Quadriceps femoris Rectus femoris only

Sartorius Gracilis Pectineus Adductor longus Gluteus maximus Hamstrings

Semitendinosus Semimembranosus Biceps femoris long head Tensor fasciae latae Iliotibial tract Gluteus medius

Flexion, outward rotation Flexion, outward rotation

Flexion Flexion, outward rotation Adduction Flexion, adduction Adduction, flexion Extension, lateral rotation

Extension Extension Extension Flexion, stabilizes knee Abduction

Quadriceps femoris Rectus femoris Vastus lateralis Vastus medialis Vastus intermedius

Hamstrings Semitendinosus Semimembranosus Biceps femoris both heads

Sartorius Gracilis Gastrocmenius

Extension Extension Extension Extension

Flexion Flexion Flexion Flexion Flexion Flexion

Tibialis anterior Fibularis longus Gastrocnemius Soleus

Dorsiflexion Eversion Plantarflexion Plantarflexion

Be able to identify all of the above muscles on charts and models 59

Be able to identify actions for all of the above muscles Be able to also list the attachments (origin and insertion) for Bolded Muscles

Attachments are listed below

Principle Skeletal Muscles

Thoracic Muscles

Rectus Abdominus Origin: Insertion: Action:

Pubis & Symphysis Pubis Ribs & Sternum Compresses abdomen, flexes vertebral column

External Obliques Origin: Insertion: Action:

Lateral Ribs Ilium & linea alba Compress abdomen, rotates & laterally flexes vertebral column

Internal Obliques Origin: Insertion: Action:

Ilium & inguinal ligament Lower ribs Compresses abdomen, rotates & laterally flexes vertebral column

Transverse Abdominus

Origin:

Ilium & lower ribs

Insertion: Sternum, Linea alba, pubis

Action:

Compresses Abdomen for: forced experation,

micturition, defecation, emesis, & parturition

Diaphragm Origin: Insertion: Action:

Dome shaped sheet, vertebrae, ribs & sternum Central tendon Floor of thoracic cavity Resperation: contracts & flattens=inspiration Relaxes & rises=exhalation

Shoulder Girdle Muscles

Trapezius Flat sheet of muscle on upper back. Four muscles

Origin:

Occipital bone, ligamentum nuchae, C7-T12 spinous processes

Insertion: Outer clavicle, spine & acromion of scapula

Action:

Elevation, Depression, Adduction & Up. Rot. of Scap.

Pectoralis Minor Small anterior, upper chest deep to pec major

Origin:

Ribs 3-5 near costal cartilage

Insertion: Coracoid process of scapula

Action:

Depression, Abduction & Downward Rotation

Serratus Anterior Sawtoothed insertion

Origin:

Lateral ribs 1-8/9

Insertion: Entire anterior, medial border of scapula

Action:

Abduct & upward rotation of scapula

60

Shoulder Joint Muscles

Deltoid Origin: Insertion: Action:

Acromion & spine of scapula, clavicle Detloid tuberosity of humerus Abducts, flexes, extends (horiz.) rotates (in. & out.)

Supraspinatus Origin: Insertion: Action:

Infraspinatus Origin: Insertion: Action:

Supraspinous fossa of scapula Top of greater tubercle of humerus Abduction of shoulder joint ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download