Lesson 19: Trunk muscles graph, additional core muscles and core exercise challenge.

by Brent Brookbush DPT, PT, MS, PES, CES, CSCS, ACSM H/FS

Trunk Muscle Graph, Additional Core Muscle and Core Exercise Challenge

Activity: Putting It All Together

Fill in the graph below: 

  • List the joint action, corresponding plane, all of the muscles that will contribute to that joint action, and a sample exercise.

The transverse abdominis (TVA) functions as a stabilizers, but does not contribute to motion of the spine.  Although we can assume that the TVA is active during all motion, this muscle should not appear on your graph.
ActionPlaneMusclesExercise that includes joint action

Cross Section of Trunk Muscles Cross Section of Trunk Muscles – http://www.bandhayoga.com/online-courses/online-courses/shaktitest/images/Blog/b38_thoraco-lumbar_section.jpg

The Lumbo Pelvic Hip Complex (LPHC)

a.k.a. "The Core"

In the previous lesson and this one (Lesson #18 and Lesson #19) we have discussed the muscle that cross the lumbar spine, but the "Core" is actually comprised of all the muscles that cross the spine, pelvis and/or hips. Look at the list below and take note of any muscles that you may not have considered a "Core Muscle" before this lesson.  Consider, the effect that muscle may have on the pelvis.

Core Muscles  (LPHC)



  • Psoas
  • Iliacus
  • Rectus Femoris
  • Tensor Fascia Latae
  • Gluteus Maximus
  • Gluteus Medius
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