On a Snellen chart we determine the line that the person can just recognize. If that line is twice as large as the reference standard (20/20), we state that that personâs MAgnification Requirement (MAR) is 2x. If the MAgnification Requirement is 2x, the visual acuity is 1/2 (20/40).
Posterior cranial fossa: It is the deepest and most capacious of the 3 cranial fossae. It contains the cerebellum, pons, and medulla oblongata. The foramen magnum is located centrally and inferiorly in the posterior fossa.
what control centers are found in the pons. pneumotaxic center, apneustic center. what control centers are found in the medulla. inspiration center, expiration center. what ist he primary site for initiation of ventilation. inspiratory center. role of inspiration center. 1. generate APs at an irregular rate of 12-15/minute.