Salasche CH1 Topographic Anatomy

Question 1

Fixed surface landmarks help locate key underlying anatomic structures

Answer 1

T

Question 2

Two most important landmarks are the MID pupillary line and posterior border to the masseter muscle

Answer 2

F, anterior border

Question 3

The temporal nerve, as it crosses zygomatic arch, and the marginal mandibular nerve along the jaw line are most vulnerable of the facial nerve

Answer 3

T

Question 4

The sternocleidomastoid muscle divides the neck into anterior and posterior triangles

Answer 4

T

Question 5

The bony orbital margin is easily palpated and is composed of roughly equal contributions of the FRONTAL, ZYGOMATIC and MAXILLARY bones

Answer 5

T

Question 6

Lateral orbital margin is formed by the frontal bone

Answer 6

F, zygomatic bone

Question 7

Buccal fat pad fills out the area beneath the malar eminence, giving cheek its fullness

Answer 7

T

Question 8

Malar eminence is formed by the prominence of the buccal fat pad

Answer 8

F - it is formed by the zygomatic arch

Question 9

Zygomatic arch becomes less visible with elderly patients

Answer 9

F, more visible

Question 10

Zygomatic arch is formed by the union of the TEMPORAL process of the zygomatic bone and the ZYGOMATIC process of the temporal bone

Answer 10

T

Question 11

Zygomatic arch serves as an attachment point for some of the muscles of facial expression and for the masseter muscle - a muscle of mastication

Answer 11

T

Question 12

Can feel masseter muscle under zygomatic arch by clenching teeth

Answer 12

T

Question 13

Superficial temporal artery exits the parotid gland at the level of the external auditory meats along with the superficial temporal vein and auriculotemporal nerve (V3)

Answer 13

T

Question 14

Can feel pulsation of superficial temporal artery in pre auricular groove at level of zygomatic arch

Answer 14

T

Question 15

With individual sitting and looking straight ahead, vertical line dropped down midpupillary line will intersect 3 important foramina

Answer 15

T - supraorbital, infraorbital, mental

Question 16

Supraorbital nerve is a branch of the first division of the trigeminal nerve

Answer 16

T

Question 17

The canine fossa is a depression in the MAXILLA above the canine tooth

Answer 17

T

Question 18

All 3 foramina in the mid pupillary line lie about 2.5cm from the midline

Answer 18

T

Question 19

Stensen’s duct extends medially from the gland in a straight line across the masseter muscle where it can be palpated as a CORD or TUBE against the clenched muscle

Answer 19

T

Question 20

Stensen’s duct enters the mouth at the level of the upper second molar

Answer 20

T

Question 21

Facial artery enters face at the upper border of the jaw

Answer 21

F, lower border

Question 22

What does injury to the temporal branch of the facial nerve cause?

Answer 22

Ipsilateral inability to wrinkle the forehead or raise the eyebrow

Question 23

Temporal nerve may be approximately projected onto the skin by a line drawn from 0.5cm below Travis to a point 1.5 to 2cm above teh lateral eyebrow

Answer 23

T

Question 24

Where is the greatest area of vulnerability of the temporal nerve

Answer 24

Draw a line connecting the tragus to the highest wrinkle on the forehead, and another line from the same point on the earlobe to the most lateral aspect of the brow

Question 25

Marginal mandibular branch is covered only by skin and SC fat but not fascia

Answer 25

F, also covered by fascia

Question 26

Marginal mandibular branch of the facial nerve exits the parotid gland at angle of the jaw

Answer 26

T

Question 27

Marginal mandibular branch of facial nerve exits the parotid gland at about the angle of the jaw and is present on the external surface of the masseter muscle in this area - this is where it may be vulnerable to damage

Answer 27

T

Question 28

Complications of transecting the spinal accessory nerve at Erb’s point

Answer 28

winged scapula 
chronic Shoulder pain 
Drooped shoulder
Paraesthesia of the arm
Inability to abduct arm beyond 80 degrees 
Wasting of the trapezius muscle