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
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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
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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 ................
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