2022 AMI Online Salon

Extraocular Muscle Movement

Project Details

  • Entrant Name:  Gyyoung Oh
  • Client: Lydia Gregg, Dr. Siobhán Cooke
  • Copyright:  Gyyoung Oh, 2022
  • Medium/software used: Adobe Photoshop
  • Final presentation format: PowerPoint slide
  • Primary Audience: Medical students

Project Description

Extraocular muscle movements are often difficult for medical students to understand. Many illustrations depict the muscles themselves, but the muscle function is often not explained well visually. The purpose of this illustration is to help students understand why four of the six extraocular muscles cause two simultaneous movements. It is intended for lectures and includes gross anatomy of all six extraocular muscles in the context of the orbit and optic nerve along with introductory text. An inset of a superior view of both orbits explains why each muscle causes two simultaneous movements when they contract. Separate illustrations focus on the muscles that cause the eye to make two simultaneous movements by showing their appearance when contracted along with the direction of the eyeball’s movement. Each contraction is shown in a different color in order to bring attention and maintain the viewer’s focus, and its contraction is emphasized by the surrounding muscles’ appearances along with the location of the pupil and iris. To emphasize the position of the eyeball, the pupil and iris are ghosted when it is rotated away from the viewer. Colored arrows explain the direction of each movement that occurs, along with a color key in the bottom right. High contrast along with different types of colorblindness were kept in consideration when choosing the colors to accommodate visually impaired audiences. For further contrast, the iris of the depicted model is a dark brown.