Question

Name six muscles with their actions

Answer 1

Explanation:

Lateral Rectus (LR)Medial Rectus (MR)Superior Rectus (SR)Inferior Rectus (IR)Superior Oblique (SO)Inferior Oblique (IO)

When considered together, with the exception of the inferior oblique, these muscles take on the shape of a cone. They attach to the eye at one end (opening of the cone) and converge upon a tendenous ring called the annulus of Zinn (vertex of the cone). This can be seen in figure 1, along with the inferior oblique's attachment to the nasal portion of the bony orbit.

The superior rectus and superior oblique muscles attach to the top of the eye. The inferior rectus and inferior oblique attach to the bottom of the eye. The lateral rectus and medial rectus attach the sides furthest from and closest to the nose, respectively. Despite the superior oblique belonging to the cone, it takes an indirect route before joining the other EOM at the annulus of Zinn; the SO attaches to the top of the eye, passes through a fibrous ring, called the "trochlea," and then converges with the other EOM