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Chap 11 Muscles
muscle names and their actions
32
Anatomy
Undergraduate 2
03/13/2012

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Term
Facial Expression
Definition
close eyes, purse lips, raise/lower corners of mouth, raise eyebrows
Term
Mastication
Definition
elevating mandible, depressing mandible, retracting mandible, gliding mandible
Term
Sternocleidomastoid
Definition
cervical flexion, lateral flexion, contralateral rotation
Term
trapezius
Definition
elevate and retract scapula
Term
Rhomboid major and minor
Definition
retract scapula
Term
Levator Scapulae
Definition
elevate scapula
Term
Erector spinae muscles (iliocostalis, longissimus, spinalis)
Definition
extend vertebral column (cervical, thoracic, and lumbar), lateral flexion
Term
Pectoralis major
Definition
adduct shoulder
Term
Pectoralis minor
Definition
protract and depress scapula
Term
intercostal muscles (external and internal)
Definition
external- elevate ribcage for inspiration
internal- depress ribcage for expiration
Term
Oblique muscles (external and internal)
Definition
external- contralateral rotation and lateral flexion
internal- ipsilateral rotation and lateral flexion
Term
rectus abdominis
Definition
flexion of vertebral column
Term
Deltoid
Definition
abducts shoulder
Term
Biceps brachii
Definition
flexion shoulder, flexion elbow, supination
Term
Brachialis
Definition
flexion elbow
Term
Triceps brachii
Definition
extension shoulder, extension elbow
Term
Brachioradialis
Definition
flexion elbow, pronation and supination
Term
Flexor digitorum (superficialis and profundus)
Definition
flexion wrist, flexion of digits 2-4
Term
Extensor digitorum
Definition
extension wrist, extension digits 2-4
Term
Thenar compartment
Definition
flexion, abduction, adduction, opposition thumb
Term
Hypothenar compartment
Definition
flexion, abduction, and opposite 5th digit
Term
Gluteus maximus
Definition
extension and external rotation hip
Term
Gluteus medius and minimus
Definition
abduction hip
Term
Quadriceps (rectus femoris, vastus medialis, vastus intermedius)
Definition
flexion hip, extension knee
Term
Sartorius
Definition
flexion hip, external rotation hip
Term
Hamstrings (biceps femoris, semitendiosus, semimembranosus)
Definition
extension hip, flexion knee
Term
Gracilis
Definition
adduction hip
Term
Adductor compartment (magnus, longus, brevis)
Definition
adduction hip
Term
Gastrocnemius
Definition
flexion knee, plantarflexion ankle
Term
Soleus
Definition
plantarflexion ankle
Term
Fibularis )longus and brevis)
Definition
eversion ankle
Term
Tibialis anterior
Definition
dorsiflexion ankle
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