OCP Exam 2 Questions & Answers 2023/2024

OCP Exam 2 Questions & Answers 2023/2024 Which muscles are involved in elevating the upper lid? - ANSWER-Levator palpebrae superioris, Muller's muscles and frontalis What is the attachment for the levator palpebrae superioris? - ANSWER-Lesser wing of sphenoid with main insertion and secondary insertion What is the attachment for Muller's muscles? - ANSWER-Aponeurosis of the levator to the upper border of tarsal plate What is the attachment of the frontalis? - ANSWER-Scalp to upper part of orbicularis oculi What is the nerve supply to the levator palpebrae superioris? - ANSWER-CN 3 What is the nerve supply to Muller's muscles? - ANSWER-Sympathetic What is the nerve supply to the frontalis? - ANSWER-CN 7 What are the characteristics of Bell's phenomenon? - ANSWER-Normal upward and outward rotation of the eyes on bilateral closure or attempted closure of eyelids Which muscles are involved in Bell's phenomenon? - ANSWER-Synergism of LPS and SR Purpose: protect the cornea fro exposure in cases of lagophthalmos (inability to close eyelid completely) What are the characteristics of voluntary blinks? - ANSWER-1. Involve recruitment of of orbital portion of orbicularis 2. Demonstrates greatest EMG amplitude