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Insertions and Origins
Goes over the basic insertions, origins, and action of general muslces in the body
120
Anatomy
Undergraduate 3
11/17/2012

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Term
Sternocleidomastoid Origin
Definition
Manubrium & medial clavicle
Term
Sternocleidomastoid Insertion
Definition
Mastoid process & superior nuchal line
Term
Sternocleidomastoid Action
Definition

Rotates and extends neck

can also flex neck and elevates face

Term
Trapezius Origin
Definition
occipital protuberance, ncuhal ligament, spinous process
Term
Trapezius Insertion
Definition
clavicle, acromion process, & scapular spine
Term
Trapezius Action
Definition
extends and laterally flexes neck
Term
Pectormalis Minor Origin
Definition
3rd to 5th ribs
Term
Pectoralis Minor
Definition
Coracoid process of scapula
Term
Pectoralis Minor Action
Definition
Depress scapular or elevates ribs
Term
Rectus Abdominis Origin
Definition
Pubic crst and symphysis pubis
Term
Rectus Abdominis Insertion
Definition
xiphoid process and inferior ribs
Term
Rectus Abdominis Action
Definition
flexes vertebral column and compresses abdomen
Term
External Abdominal Oblique Origin
Definition
5th to 12th ribs
Term
External Abdominal Oblique Insertion
Definition
Ilia crest, inguinal ligament, & rectus sheath
Term
External Abdominal Oblique Action
Definition
flexes & rotates vertebral column; compreses abdomen; depresses throax
Term
Internal Abdominal Oblique Origin
Definition
Iliac crest, inguinal ligament, & lumbar fasica
Term
Internal Abdominal Oblique Insertion
Definition
10th to 12th ribs & rectus sheath
Term
Internal Abdominal Oblique Action
Definition
flexes and rotates vertebral column; compresses abdomen; depresses thorax
Term
Serratus Anterior Origin
Definition
1st to 8th/9th rib
Term
Serratus Anterior Insertion
Definition
medial border of scapula
Term
Serratus Anterior Action
Definition
rotates & protracts scapula; elevates ribs
Term
Transverse Abdominis Insertion
Definition
xiphoid process, linea alba, & pubic tubercle
Term
Transverse Abdominis Origin
Definition
7th to 12th costal cartilage; lumbar fascia; iliac crest; inguinal ligament
Term
Transverse Abdominis Action
Definition
compresses abdomen
Term
Erector Spinae Origin
Definition
along the vertebral spine
Term
Erector Spinae Insertion
Definition
spinous process of above vertebrae
Term
Erector Spinae Action
Definition
extends neck, head, vertebral column, also laterally flexes & rotates vertebral column
Term
Deltoid Origin
Definition
clavicle, acromion process, & scapular spine
Term
Deltoid Insertion
Definition
deltoid tuberosity
Term
Deltoid Action
Definition
flexes & extends shoulder; abducts arm; medially & laterally rotates arm
Term
Pectoralis Major Origin
Definition
clavicle, sternum, superior 6 costal cartilages & abdominal aponeurosis
Term
Pectoralis Major Insertion
Definition
lateral crest of intertubular groove
Term
Pectoralis Major Action
Definition
flexes shoulder; adducts & medially rotates arml extends shoulder from flexed position
Term
Latissimus Dorsi Origin
Definition
spinous processes of T7-L5, sacrum & iliac crest, interfio angle of scapula in some people
Term
Latissimus Dorsi Insertion
Definition
medial crest of intertubercular groove
Term
Latissimus Dorsi Action
Definition
abducts & medially rotates arm; extends shoudler
Term
Biceps Brachii Origin
Definition

long head- supraglenoid tubercle

short head- coracoid process

Term
Biceps Brachii Insertion
Definition
radial tuberosity & aponeurosis of biceps brachii
Term
Biceps Brachii Action
Definition
flexes shoulder & elbow; supinates forearm & hand
Term
Triceps Brachii Origin
Definition

long head- infraglenoid tubercle

short head- lateral & posterior surface of humerus

medial head- posterior humerus

Term
Triceps Brachii Insertion
Definition
olecranon process of ulna
Term
Triceps Brachii Action
Definition
extends elbow; extends shoudler; adducts arm
Term
Brachialis Origin
Definition
anterior surface of humerus
Term
Brachialis Insertion
Definition
ulnar tuberosity & coronoid process of ulna
Term
Brachialis Action
Definition
flexes elbow
Term
Brachoradialis Origin
Definition
lateral supracondylar ridge of humerus
Term
Brachoradialis Insertion
Definition
styloid process of radius
Term
Brachoradialis Action
Definition
extends elbow
Term
Infraspinatus Origin
Definition
infraspinous fossa of scapula
Term
Infraspinatus Insertion
Definition
greater tubercle of humerus
Term
Infraspinatus Action
Definition
laterally rotates arm; holds head of humerus
Term
Teres Minor Origin
Definition
lateral border of scapula
Term
Teres Minor Insertion
Definition
greater tubercle of humerus
Term
Teres Minor Action
Definition
laterally rotates & adducts arm; holds humerus head in place
Term
Subscapularis Origin
Definition
subscapular fossa
Term
Subscapularis Insertion
Definition
lesser tubercle of humerus
Term
Subscapularis Action
Definition
medially rotates arm & holds head of humerus in place
Term
Supraspinatus Origin
Definition
supraspinous fossa
Term
Supraspinatus Insertion
Definition
greater tubercle of humerus
Term
Supraspinatus Action
Definition
abducts arm; holds humerus head in place
Term
Teres Major Origin
Definition
lateral boder of scapula
Term
Teres Major Insertion
Definition
medial crest of intertubercular groove
Term
Teres Major Action
Definition
extends shoulder; adducts & medially rotates arm
Term
Rhomboid  Origin
Definition
spinous process T1-T4 & C6-C7
Term
Rhomboid  Insertion
Definition
medial border of scapula
Term
Rhomboid Action
Definition

depresses scapula; elevates ribs

 

Term
Levator Scapulae  Orgin
Definition
tansverse proceeses of C1-C4
Term
Levator Scapulae Insertion
Definition
superior angle of scapula
Term
Levator Scapulae Action
Definition
elevates, retracts, & rotates scapula; laterally flexes neck
Term
Splenius Origin
Definition
spinous processes of C3-C5
Term
Splenius  Insertion
Definition
transverse process C1-C3
Term
Splenius Action
Definition
rotates & extends neck
Term
Gluteus Maximus Origin
Definition
posterior surface of ilum, sacrum, & coccyx
Term
Gluteus Maximus Insertion
Definition
gluteal tuberosity of femur & iliotibial tract
Term
Gluteus Maximus Action
Definition
extends hip; abducts & laterally rotates thigh
Term
Gluteus Medius Origin
Definition
posterior surface of ilium
Term
Gluteus Medius Insertion
Definition
greater trochanter of femur
Term
Gluteus Medius Action
Definition
abducts & medially rotates thigh; tilts pelvis toward supported side
Term
Sartorius Origin
Definition
anterior superior iliac spine
Term
Sartorius Insertion
Definition
medial side of tibial tuberosity
Term
Sartorius Action
Definition
flexes hip & knee; rotates thigh laterally & leg medially
Term
Tensor Fascia Lata Origin
Definition
anterior superior iliac spine
Term
Tensor Fascia Lata Insertion
Definition
through iliotibial tract to lateral condyle of tibia
Term
Tensor Fascia Lata Action
Definition
tenses lateral  fascia & stabilizes femur on tibia when standing; flexes hip; abducts & medially rotates thigh; tilts pelvis
Term
Rectus Femoris Origin
Definition
anterior interfior iliac spine
Term
Rectus Femoris Insertion
Definition
patella & ontal tibial tuberosity through patellar ligament
Term
Rectus Femoris Action
Definition
extends knee; flexes hip
Term
Vastus Medialis Origin
Definition
linea aspera of femur
Term
Vastus Medialis Insertion
Definition
patella & onto tibial tuberosity through patella ligament
Term
Vastus Medialis Action
Definition
extends knee
Term
Vastus Intermedius Origin
Definition
body of femur
Term
Vastus Intermedius Insertion
Definition
patella & onto tibial tuberosity through the patellar ligament
Term
Vastus Intermedius Action
Definition
extends knee
Term
Vastus Lateralis Origin
Definition
greater trochanter & linea aspera of femur
Term
Vastus Lateralis Insertion
Definition
patella & onto tibial tuberosity through the patellar ligament
Term
Vastus Lateralis Action
Definition
extends knee
Term
Adductor Group Action
Definition
adducts, laterally rotates thigh; flexes hip
Term
Gracilis Origin
Definition
pubis near symphysis
Term
Adductor Group Origin
Definition
pubis
Term
Adductor Group Insertion
Definition
linea aspera of femur
Term
Gracilis Insertion
Definition
tibia
Term
Gracilis Action
Definition
adducts thigh; flexes knee
Term
Biceps Femoris Origin
Definition

long head- ischial tuberosity

short head- femur

Term
Biceps Femoris Insertion
Definition
head of fibula
Term
Biceps Femoris Action
Definition
flexes knee; extends hip; laterally rotates leg
Term
Semitendinosus Origin
Definition
ischial tuberosity
Term
Semitendinosus Insertion
Definition
tibia
Term
Semitendinosus Action
Definition
flexes knee; medially rotates leg; extends hip
Term
Semimembranosis Origin
Definition
ischial tuberosity
Term
Semimembranosis Insertion
Definition
medial condyle of tibia & collateral ligament
Term
Semimembranosis Action
Definition
flexes knee; medially rotates leg; tenses capsule of knee joint; extends hip
Term
Gastrocnemius Origin
Definition
medial & lateral condyles of femurs
Term
Gastrocnemius Insertion
Definition
achilles tendon to calcaneus
Term
Gastrocnemius Action
Definition
plantar flexes foot; flexes knee
Term
Soleus Origin
Definition
fibula & tibia
Term
Soleus Insertion
Definition
through calcaneal tendon (Achilles) to calcaneus
Term
Soleus Action
Definition
plantar flexes foot
Term
Tibia Anterior Origin
Definition
proximal, lateral tibia & interosseous membrane
Term
Tibia Anterior Insertion
Definition
distal phalanx of greater toe
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