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