Functional Anatomy of Major Muscles - Abdominal Musculature

Question 1

Rectus abdominis

Answer 1

Isolated function: Concentric- spinal flexion, lateral flexion, and rotation
Integrated function: eccentric-spinal extension, lateral flexion, and rotation
Isometric-stabilizes the lumbo-pelvic-hip complex

Question 2

External oblique

Answer 2

Isolated function: concentric-spinal flexion, lateral flexion, and contralateral rotation
Integrated function: eccentric-spinal extension, lateral flexion, and rotation
Isometric-stabilizes the Lumbo-pelvic-hip complex

Question 3

Internal oblique

Answer 3

Isolated function: concentric-spinal flexion (bilateral), lateral flexion, and ipsilateral rotation
Integrated function: eccentric-spinal extension, rotation, and a lateral flexion
Isometric-stabilizes the lumbo-pelvic-hip complex

Question 4

Transverse abdominis

Answer 4

Isolated function: concentric-increases intra-abdominal pressure. Supports the abdominal viscera
Integrated function: eccentric-spinal extension, rotation, and lateral flexion
Isometric- Stabilizes the Lumbo-pelvic-hip complex

Question 5

Diaphragm

Answer 5

Isolated function Concentrix pulls the central tendon inferiorly, increasing the volume in the thoracic capacity
Integrated function: Isometric-stabilization of the lumbar-pelvic-hip complex