Muscles - Origin & Insertion Flashcards
epicranius frontal belly
origin: epicranial aponeurosis
insertion: skin of eyebrows and root of nose
epicranius occipital belly
origin: occipital and temporal bones
insertion: epicranial aponeurosis
zygomaticus major & minor
origin: zygomatic bone
insertion: skin and muscle at corner of mouth
masseter
origin: zygomatic arch and zygomatic bone
insertion: angle of ramus and mandible
temporalis
origin: temporal fossa
insertion: coronoid process of mandible
sternocleidomastoid
origin: manubrium of sternum and medial portion of clavicle
insertion: mastoid process of temporal bone and superior nuchal line of occipital bone
deltoid
origin: lateral 1/3 of clavicle; acromion and spine of scapula
insertion: deltoid tuberosity of humerus
pectoralis major
origin: clavicle, sternum, cartilage of ribs 1-6 (or 7), and aponeurosis of external oblique muscle
insertion: fibers converge to insert by short tendon into intertubercular sulcus of humerus
pectoralis minor
origin: anterior surface of ribs 3-5, near their costal cartilages
insertion: coracoid process of scapula
serratus anterior
origin: lateral aspect of ribs 1-8 (or 9)
insertion: vertebral border of anterior surface of scapula
external intercostals
origin: inferior border of rib above
insertion: superior border of rib below
internal intercostals
origin: superior border of rib below
insertion: inferior border of rib above
rectus abdominis
origin: pubic crest and symphysis
insertion: xiphoid process and costal cartilages of ribs 5-7
trapezius
origin: occipital bone; ligamentum nuchae; spines of C7 and all thoracic vertebrae
insertion: acromion and spinous process of scapula; lateral third of clavicle
latissimus dorsi
origin: indirect attachment to spinous processes of lower six thoracic vertebrae, lumbar vertebrae, last three to four ribs, & iliac crest
insertion: floor of intertubercular sulcus of humerus
teres major
origin: posterior surface at inferior angle of scapula
insertion: intertubercular sulcus of humerus
teres minor
origin: lateral margin of posterior scapula
insertion: greater tubercle of humerus
supraspinatus
origin: supraspinous fossa of scapula
insertion: greater tubercle of humerus
infraspinatus
origin: infraspinous fossa of scapula
insertion: greater tubercle of humerus
subscapularis
origin: subscapular fossa
insertion: lesser tubercle of humerus
rhomboid minor & major
origin: spinous processes of C7 and T1-T5
insertion: medial border of scapula
biceps brachii long head
origin: supraglenoid tubercle and lip of glenoid cavity; tendon of long head runs in intertubercular sulcus and within capsule of shoulder joint
insertion: radial tuberosity
biceps brachii short head
origin: coracoid process
insertion: radial tuberosity
brachialis
origin: distal portion of anterior humerus
insertion: coronoid process of ulna
brachioradialis
origin: lateral ridge at distal end of humerus
insertion: base of radial styloid process
triceps brachii lateral head
origin: posterior humerus
insertion: olecranon of ulna
triceps brachii medial head
origin: distal radial groove on posterior humerus
insertion: olecranon of ulna
triceps brachii long head
origin: inferior margin of glenoid cavity
insertion: olecranon of ulna
iliopsoas - iliacus
origin: iliac fossa and crest, lateral sacrum
insertion: on and just below lesser trochanter of femur
iliopsoas - psoas major
origin: transverse processes, bodies, and discs of T12 and lumbar vertebrae
insertion: on and just below lesser trochanter of femur
sartorius
origin: anterior superior iliac spine
insertion: by an aponeurosis into medial aspect of proximal tibia
gracilis
origin: inferior ramus and body of pubis
insertion: medial surface of tibia just inferior to medial condyle
gluteus maximus
origin: dorsal ilium, sacrum, and coccyx
insertion: gluteal tuberosity of femur and iliotibial tract
tensor fasciae latae
origin: anterior aspect of iliac crest and anterior superior iliac spine
insertion: iliotibial tract
adductor magnus
origin: ischial and pubic rami and ischial tuberosity
insertion: linea aspera and adductor tubercle of femur
quadriceps group: rectus femoris
origin: anterior inferior iliac spine and superior margin of acetabulum
insertion: tibial tuberosity and patella
biceps femoris long head
origin: ischial tuberosity
insertion: tendon passes laterally to insert into head of fibula and lateral condyle of tibia
biceps femoris short head
origin: linea aspera and distal femur
insertion: tendon passes laterally to insert into head of fibula and lateral condyle of tibia
semitendinosus
origin: ischial tuberosity
insertion: medial aspect of upper tibial shaft
semimembranosus
origin: ischial tuberosity
insertion: medial condyle of tibia; lateral condyle of femur
gastrocnemius
origin: by two heads from medial and lateral condyles of femur
insertion: calcaneus via calcaneal tendon
soleus
origin: proximal portion of tibia and fibular; interosseous membrane
insertion: calcaneus via calcaneal tendon
tibialis anterior
origin: lateral condyle and upper 2/3 of tibia; interosseous membrane
insertion: by tendon into inferior surface of first cuneiform and metatarsal I
tibialis posterior
origin: superior portion of tibia and fibula and interosseous membrane
insertion: tendon passes obliquely behind medial malleolus and under arch of foot; inserts into several tarsals and metatarsals II-IV
