attachments and origins

Question 1

HYOID BONE

Location:
attachment:
function:

Answer 1

Location: inferior to mandible

Attachment: to styloid processes of
temporal bone via stylohyoid
ligaments

Functions:
Movable base for the tongue.
Attachment sites for muscles that
raise and lower larynx during
swallowing.

Question 2

STERNOCLEIDOMASTOID

insertion:

origins:

Action

Answer 2

I-mastoid process.

origins: manubrium of the sternum
and medial clavicle

action: Flexion, lateral rotation of head

Question 3

PECTORALIS MAJOR

I-

O-

A-

Answer 3

I-greater tubercle of humerus. (bicipital groove)

O-clavicle, sternum, costal cartilages ribs 1-6, aponeurosis of external oblique.

Action: arm flexor

Question 4

DELTOID

I-

O-

A-

Answer 4

I-deltoid tuberosity.

O-lateral third of clavicle, acromion process, spine of scapula.

Action: arm abductor

Question 5

BICEPS BRACHII

Answer 5

I-radial tuberosity.

O-short head: coracoid process; long head: supraglenoid
tubercle, superior margin of glenoid cavity

Actions: forearm flexor, supinator

Question 6

LATISSIMUS DORSI

Answer 6

I-intertubercular sulcus of humerus.

O-spinous processes of T7-L5 vertebrae, thoracolumbar aponeurosis,
iliac crest

Action: arm extensor

Question 7

SARTORIUS

Answer 7

I-medial aspect of proximal tibia.

O-anterior superior iliac spine

Actions: thigh flexion, abduction, lateral rotation

Question 8

rectus femoris

Answer 8

I-patella and tibial tuberosity via patellar ligament.

O-anterior inferior iliac spine, superior margin of the
acetabulum

Actions: flex hip, extend knee

Question 9

GLUTEUS MAXIMUS

Answer 9

I-gluteal tuberosity
(inferior to greater trochanter), iliotibial tract.

O-dorsal ilium, sacrum, coccyx

Question 10

GASTROCNEMIUS

Answer 10

I-posterior calcaneus via calcaneal tendon.

O-two heads from medial and lateral condyles of the femur.

Action: Plantarflexion