Origins and Insertions Flashcards
Sternocleidomastoid
O: Sternum, Clavicle
I: Mastoid Process
Sternocleidomastoid Function
Flexes head side to side, rotates it
Diaphragm
O: Sternum, rib cartilage, L
I: Central tendon
Rectus Abdominis
O: Pubic crest, symphysis pubis
I: Xiphoid process, interior ribs
Rectus Abdominis Function
Flex, exhaling, defecation
External Oblique
O: 5-12 Ribs
I: Iliac crest, linea alba, pubis
External Oblique Function
Flex, rotate vertebral, compress abdomen
Pectoralis Major
O: Clavicle, lower sternum, costal cartilage, external oblique muscles
I: Intertubercular groove
Pectoralis Major Function
Internal rotation, adduction, flexion
Latissimus Dorsi
O: L, T, iliac crest, sacrum
I: Humerus
Latissimus Dorsi Function
Adductor, extensor, internal rotator
Supraspinatus
O: Supraspinous fossa
I: Greater tubercle
Supraspinatus Function
Stabilize shoulder, adducts
Infraspinatus
O: Infraspinous fossa
I: Greater tubercle
Infraspinatus Function
Stabilize shoulder, laterally rotates
Teres minor
O: Lateral border
I: Greater tubercle
Teres Minor Function
Stabilize shoulder, laterally rotates
Subscapularis
O: Subscapular fossa
I: Lesser tubercle
Subscapularis Function
Stabilizes shoulder, rotates medially
Trapezius
O: Nuchal line, C, T
I: Clavicle, scapular spine
Trapezius Function
Elevation, adduction, extends neck
Biceps Brachii
O: Coracoid process, supraglenoid tubercle
I: Radial tuberosity
Biceps Brachii Function
Supinates forearm, flex elbow
Triceps Brachii
O: Infraglenoid tubercle
I: Olecranon
Triceps Brachii Function
Elbow flexor
Brachioradialis
O: Lateral epicondyle of humerus
I: Styloid process
Brachioradialis Function
Elbow flexor btwn supination & pronation
Gluteus maximus
O: Crest of ilium, sacrum, coccyx
I: Greater trochanter
Gluteus Maximus Function
Hip extension, external rotation
Sartorius
O: Anterior Superior Iliac Spine
I: Medial tibia
Sartorius Function
Flexion, outward rotation, flex knee
Adductor Longus
O: Pubis body
I: Linea aspera
Adductor Longus Function
Hip adduction
Adductor Magnus
O: Pubis body, ischial tuberosity
I: Linea aspera, adductor tubercle
Adductor Magnus Function
Hip adduction, extension
Adductor Brevis
O: Rumis of pubis
I: Linea aspera, pectineal line
Adductor Brevis Function
Hip adduction, flexion
Pectineus
O: Superior ramis of pubis
I: Linea aspera, lesser trochanter
Rectus Femoris
O: Anterior Interior Iliac Spine
I: Tibial tuberosity, patella
Rectus Femoris Function
Knee extension, hip flexion
Vastus Lateralis
O: Greater trochanter, linea aspera
I: Tibial tuberosity, patella
Vastus Lateralis Function
Knee extension
Vastus Intermedius
O: Femoral shaft
I: Tibial tuberosity, patella
Pectineus Function
Hip adduction, flexion
Vastus Intermedius Function
Knee extension
Vastus Medius
O: Linea aspera
I: Tibial tuberosity, patella
Vastus Medius Function
Knee extension
Biceps Femoris
O: Ischial tuberosity, linea aspera
I: Fibula Head
Biceps Femoris Function
Hip extensor, flexor, external rotation of knee
Semimembranosus & Semitendinosus
O: Ischial tuberosity
I: Medial condyle
Semimembranosus & Semitendinosus Function
Flexes knee, rotates inwards, extends hip
Gastrocnemius
O: Femoral Condyles
I: Calcaneus
Gastrocnemius Function
Plantar flexes ankle, flexes knee
Soleus
O: Upper fibula
I: Calcaneus
Soleus Function
Plantar flexes ankle
Tibialis Anterior
O: Tibia
I: 1st metatarsals
Tibialis Anterior Function
Dorsiflexes ankle, inverts foot
Chemical Released in Muscle Cells from AP
Acetylcholine
Chemicals that block Myosin and Actin from Binding
Troponin and tropomyosin