SESSION 10-1 W. 09_17_default_d30dcfa7 2

Week 4: Session 10 - September 17, 2024

Announcements & Course Logistics

  • Mid-week 4, 10th session.
  • Religious Holidays: Acknowledged; students are responsible for rescheduling work appropriately as assignments have been posted for a while. Late assignments are not accepted.
  • Module 1 Deadline: Monday by 11:59 PM11:59 \text{ PM}.
  • Quizzes:
    • Quiz 2 requires computers with Respondus LockDown Browser. If assistance is needed, PC IT is located in the Sverbal Library, second floor.
    • Quizzes will be returned on Friday, with comments from the instructor.
  • Laboratory Practical Exams:
    • Literally around the corner (next week).
    • Students who have done the labs and reviewed resources should have no problem.
    • Represents 40%40\% of the total semester grade, a critical component.
    • Both courses (lecture and lab) are linked.
  • Course Content Overview:
    • Currently in Unit 2, finishing discussions on joints.
    • Starting Friday, the focus will shift to muscle tissues and the muscular system.
    • Chapter 4 (tissue level of organization) is not covered as a standalone chapter but appropriate sections are pulled out based on the organ system being studied (e.g., osseous tissue already covered, muscular tissue next).
  • Outline/Study Guide:
    • An outline was provided in last week's Moodle posting titled "Osseous System Parts One, Two, Three, and Four." It was in outline form but not explicitly labeled "outline."
    • This document serves as a study guide for exams and may assist with lab material.

Movements Allowed by Synovial Joints

Gliding
  • Definition: Movement where flat bone surfaces slide over one another.
  • Characteristics: Intercarpal joints (wrist) and intertarsal joints (ankle).
Flexion
  • Definition: Movement that decreases the angle between two body parts.
  • Examples:
    • Flexion of the arm and leg.
    • Dorsiflexion (moving foot upwards towards shin) vs. Plantar Flexion (pointing toes downwards).
    • Flexion of the head (drawing head down in anterior direction from anatomical position).
    • Flexion of the forearm, flexion at the wrist (hand starts in prone position).
Extension
  • Definition: The opposite of flexion; movement that increases the angle between two body parts.
  • Hyperextension: Forcing a movement beyond the normal anatomical limit (e.g., forcing neck backwards). Could lead to whiplash in severe cases (severe hyperflexion-extension).
  • Clinical Relevance - Whiplash:
    • In automobile accidents (rear-ended), the neck is stabilized with a collar.