● Anatomy atlas · curriculum reference

Know the body you’re asking to move.

A clinical-grade reference tying every pose in the program to the muscles, nerves, and structures it recruits. Peer-reviewed. Adult. Not a search result.

42plates7systems18reviewersRev. 2026.04
PL · 04 / 07

Pelvic floor, sagittal view

Levator aniPubococcygeus · puborectalisPubicsymphysisCoccyxPudendal n.S2–S4 branchesCoccygeus5 cm
Plate 04 · reviewed by Dr. Hana Yoo, PT, DPT · 2026-02

Structure

RegionPelvic diaphragm
Primary actionSupport / continence
InnervationS2–S4
Layers3
Breath linkCo-contracts w/ diaphragm

Appears in modules

Module 04 · Pelvic anatomy
8 sessions · solo & partnered
Module 07 · Continence & release
6 sessions
Module 12 · Partnered alignment
Elite tier · 4 sessions

Common misconceptions

“Kegels alone = strong pelvic floor.”

Strength without release is rigidity. Half the work is learning to let go.

— Dr. Hana Yoo

How poses land in the body

Recruitment ratings · 0–100
Supported bridge
Module 04 · S3
  • Gluteus maximus78
  • Pelvic floor64
  • Diaphragm41
  • Thoracic ext.52
Deep squat, relaxed
Module 02 · S4
  • Adductor magnus71
  • Psoas, released44
  • Pelvic floor58
  • Tibialis post.62
Partnered axis-hold
Module 08 · S1 · partnered
  • Erector spinae (both)82
  • Transverse abdom.69
  • Thoracic rotators48
  • Scapular stab.55
Seated forward fold
Module 01 · S6
  • Hamstrings84
  • Thoracolumbar fascia71
  • Posterior chain66
  • Vagal tone (parasymp.)40

Sources, not vibes.

Every plate is reviewed by a licensed clinician and traced to a primary source. You can audit our references the same way you’d audit a textbook.

  1. 01
    Book
    Netter's Atlas of Human Anatomy, 8th ed.
    Plates 383–398 · pelvic floor series
    2023
  2. 02
    Paper
    Neural control of the pelvic floor muscles
    de Groat et al. · Nature Rev. Urol.
    2021
  3. 03
    Guideline
    Pelvic floor rehabilitation, clinical practice
    APTA Section on Pelvic Health
    2024
  4. 04
    Paper
    Co-activation of diaphragm and pelvic floor during breath
    Hodges & Sapsford · J. Physiother.
    2022
  5. 05
    Review
    Interoception and sexual function: a scoping review
    Berger et al. · Arch. Sex. Behav.
    2023
This atlas is a reference, not a replacement. It supports the program; it does not diagnose. If something in your body asks for a clinician, see one. We keep a short list — referrals.