Which muscle is a stabilization muscle of the core?

Which muscle is a stabilization muscle of the core?

• A. Internal obliques
• B. External obliques
• C. Diaphragm
• D. Psoas major

Answer: (A)

Stability of the torso comes from muscles that brace the spine and resist twisting or shifting during movement. The internal obliques run diagonally across the abdomen and help brace the core by increasing intra-abdominal pressure and providing lateral and rotational stability. They work with the deeper transverse abdominis to keep the spine supported during twisting, bending, and lifting, making them a primary stabilization contributor. The external obliques are more about producing trunk flexion and rotation rather than steadying the spine. The diaphragm does assist core stability by helping generate intra-abdominal pressure, but its main role is breathing, not stabilization alone. The psoas major is mainly a hip flexor and its involvement in spinal stabilization is less direct. So the internal obliques best fit the role of stabilization muscles of the core.

Stability of the torso comes from muscles that brace the spine and resist twisting or shifting during movement. The internal obliques run diagonally across the abdomen and help brace the core by increasing intra-abdominal pressure and providing lateral and rotational stability. They work with the deeper transverse abdominis to keep the spine supported during twisting, bending, and lifting, making them a primary stabilization contributor.

The external obliques are more about producing trunk flexion and rotation rather than steadying the spine. The diaphragm does assist core stability by helping generate intra-abdominal pressure, but its main role is breathing, not stabilization alone. The psoas major is mainly a hip flexor and its involvement in spinal stabilization is less direct. So the internal obliques best fit the role of stabilization muscles of the core.