Torso Muscles

The human torso or trunk contains a number of muscles that participate in major body movements and the functioning of vital organs. Here is a list of all the muscles in this region:

Abdominal Muscles

1. Rectus abdominis
2. External oblique
3. Internal oblique
4. Transversus abdominis
5. Pyramidalis 
6. Quadratus lumborum

Back Muscles

1. Splenius Muscles
   1. Splenius capitis
   2. Splenius cervicis
2. Erector spinae
   1. Spinalis
   2. Longissimus
   3. Iliocostalis
3. Transversospinales
   1. Semispinalis
      1. Semispinalis Capitis
      2. Semispinalis Cervicis
      3. Semispinalis Thoracis
   2. Multifidus
   3. Rotatores
4. Segmental Muscles (Minor Deep Muscles)
   1. Interspinales
   2. Intertransversarii

Spine Muscles (Muscles of the Vertebral Column)

1. Trapezius
2. Latissimus dorsi
3. Rhomboids
   1. Rhomboid major
   2. Rhomboid minor
4. Levator scapulae

Chest Muscles

1. Intercostals
   1. external
   2. internal
   3. innermost
2. Subcostalis
3. Transversus thoracis
4. Levatores costarum
5. Serratus posterior
   1. Serratus posterior inferior muscle
   2. Serratus posterior superior muscle
6. Diaphragm

Thoracic Wall Muscles

1. Pectoralis major
2. Pectoralis minor
3. Subclavius
4. Serratus anterior

Pelvic Floor Muscles

1. Coccygeus
2. Levator ani
   1. Iliococcygeus
   2. Pubococcygeus
   3. Puborectalis

Perineal Muscles

Sphincter ani

1. External anal sphincter
2. Internal anal sphincter

Superficial perineal pouch

1. transversus perinei superficialis
2. Bulbospongiosus
3. Ischiocavernosus

Deep perineal pouch

1. Transversus perinei profundus
2. Sphincter urethrae membranaceae