Trunk Flexion PDF - 1446 H/2024 A.D
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Uploaded by BelievableAphorism2297
Jazan University
2024
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Summary
This document is a theoretical part of a manual muscle test, focusing on the topic of trunk flexion. It describes the primary and accessory muscles involved in trunk flexion, the range of motion, and factors limiting the motion. The document includes diagrams illustrating the anatomy and principles involved.
Full Transcript
# Trunk flexion 1446 H/2024 A.D ## Manual Muscle Test 200 PHT - Theoretical Part. Jazan University, College of Nursing and Health Sciences, Physical Therapy Department. ## 27" lecture Theoretical Part: Trunk Flexion. ### Objectives: At the end of this lecture the student will be able to: 1....
# Trunk flexion 1446 H/2024 A.D ## Manual Muscle Test 200 PHT - Theoretical Part. Jazan University, College of Nursing and Health Sciences, Physical Therapy Department. ## 27" lecture Theoretical Part: Trunk Flexion. ### Objectives: At the end of this lecture the student will be able to: 1. Identify the primary muscles involved in and trunk flexion. 2. Identify the range of motion of trunk flexion. ### Content: 1. Primary muscles involved in trunk flexion. 2. Range of motion of trunk flexion. ### Trunk Flexion Motion #### Primary Muscle: a. Rectus abdominis. #### Accessory Muscles: 1. Internal obliques 2. External obliques ### Range of motion & fixation: In back lying position, flexion of thorax on pelvis until scapulae are raised from table. - Motion takes place primarily in thoracic spine (trunk is carried through reminder of range to sitting position by reverse action of hip flexors with abdominal muscles acting as fixators) as shown in figure 1. #### Figure 1: Trunk flexion motion. A diagram of a person laying supine on the floor with their arms by their sides with their head, neck and shoulders elevated off the floor. The line of action is shown as going from the pelvis to the shoulders. ### Factors limiting motion: 1. Tension of the posterior longitudinal ligament, ligament flava, and interspinal and supraspinal ligaments. 2. Tension of spinal extensor muscles. 3. Compression of intervertebral fibrocartilages in front. 4. Contact of lower ribs with abdomen. ### Anatomy of rectus abdominis #### Origin: Crest of pubis Ligaments covering front of symphysis pubis (Fig. 2). #### Insertion: By three portions into cartilages of fifth, six, and seventh ribs #### Nerve supply: Lower intercostal nerves #### Figure 2: Rectus abdominis muscle. A diagram of a person laying supine on the floor with their arms by their sides. The rectus abdominis muscles are highlighted, along with the area of the origin and insertion points.
