Sys tx final

Question 0

Temporalis

Answer 0

O: Temporal fossa
I: coronoid process and ramus of mandibule
A: Elevates and retracts the jaw (mandible at TMJ)
CN V Trigeminal nerve

Question 1

Masseter

Answer 1

O: superficial layer - zygomatic bone and zygomatic arch Deep layer - inferior margin and deep surface of zygomatic arch
I: superficial layer - angle and 1/2 ramus of mandible Deep layer - coronoid process 1/2 ramus of mandibule
A: Superficial elevates and protracts
Deep elevates and retracts

CNV trigeminal. maxillary artery

Question 2

Diaphragm

Answer 2

O: Lumber spine (L1-L3), Rib 7-12 (internal surface) and the costal cartilages, sternum, Xyphoid
I: Central tendon of diaphragm
A: Increases the volume of the thoracic cavity via abdominal breathing during inspiration
Phrenic nerve
Aorta and medial thoracic artery

Question 3

Subclavius

Answer 3

O: 1st rib to
I: middle of infeior surface of clavicle
A: Depresses clavicle at sternoclavicular joint
elevates 1st rib at sternocostal and costospinal joint
brachial plexus
suprascapular and branch from axillary

Question 4

Serratus Anterior

Answer 4

O: Ant-lat portion of ribs 1-9
I: Anterior surface of the medial boarder of scapula
A: protraction and upwards rotation of the scapula at the ScC joint
Long thoracic nerve
Dosal scapular and lateral thoracic

Question 5

External intercostals

Answer 5

O: Inferior border of 1 rib
I: superior surface of rib directly below (fibers same as external oblique)
A: elevation of ribs 2-12 at sternocostal and costal spinal joint (during inspiration)
Intercostal nerves
Anterior and posterior intercostal arteries

Question 6

Internal Intercostals

Answer 6

O: Superior border of 1rib
I inferior surface of rib directly above (fibers same as internal obliques)
A: depresses ribs 1-11 at sternocostal and costospinal joint (during expiration)
intercostal nerves
Anterior and posterior intercostal arteries

Question 7

Sternocleidomastoid

Answer 7

O: 2 heads
sternal: manubrium
Clavicular: medial 1/3 of clavicle

I: mastoid process of temporal bone and lateral half of superior nuchal line of occiput

Flexion of lower neck at the spinal joint
Extension of the head and upper neck at the spinal joint
lateral flexion and contralateral rotation of the head and neck at the spinal joint
Spinal accessory nerve (CN XI)

Question 8

Trapezius

Answer 8

Upper: EOP and MED 1/3 of superior Nuchalline and nuchal ligament and SP C7 to Acromion and Lat 1/3 clavicle. Action is elevate scapula at ScC jt

Middle SPs of T1-T5 to Acromion and spine of scapula

Lower: SPs of T6-T12 to Root of spine of scapula. Action is depressing scapula at ScC jt

All fivers will retract the scapula at the Scapulocostal joint
Spinal accessory CN XI