EOMs ductions (M1)

Question 1

define duction

Answer 1

movements of one eye

Question 2

Fick’s axes

Answer 2

x-axis: horizontal/transverse
- supraduction
- infraduction
y-axis: sagittal/visual
- incyloduction (intorsion)
- excycloduction (extorsion)
z-axis: vertical acix
- adduction
- abduction

Question 3

what happens to rotation if the course of a muscle is parallel to an axis

Answer 3

no rotation around that axis

Question 4

what happens to rotation if the course of a muscle is perpendicular to an axis

Answer 4

only rotation for that muscle is around that axis

Question 5

what are muscle movements based on

Answer 5

movement of muscle from its insertion towards its origin

Question 6

actions from primary gaze - medial rectus

Answer 6

perpendicular to vertical axis (z-axis).
ADducts the eye

Question 7

actions from primary gaze - lateral rectus

Answer 7

perpendicular to vertical axis (z-axis).
ABducts the eye

Question 8

actions from primary gaze - superior rectus

Answer 8

forms 23 degree angle with visual axis (Y-axis, sagittal axis).
supraducts the eye

Question 9

actions from primary gaze - inferior rectus

Answer 9

forms 23 degree angle with visual axis (y-axis, sagittal axis).
infraducts the eye

Question 10

actions from primary gaze - superior oblique

Answer 10

forms 55 degree angle with visual axis (y-axis, sagittal axis).
intorts the eye

Question 11

actions from primary gaze - inferior oblique

Answer 11

forms 51 degree angle with visual axis (y-axis, sagittal axis).
extorts the eye

Question 12

define versions

Answer 12

movement of both eyes in the same direction

Question 13

define vergences

Answer 13

movement of both in opposite directions