背部肌肉

Extrinsic

Intrinsic

Superficial

Intermediate

Superficial

Trapezius

Latissimus dorsi

Levator scapulae

Rhomboid major

Rhomboid minor

Serratus posterior superior

Serratus posterior inferior

Intermediate

Deep

Splenius cervicis

Splenius capitis

Erector spinae

Iliocostalis

Longissmus

Spinalis

Transversospinalis

Semispinalis

Multifidus

Rotatores