📖 Static demo — read-only snapshot

You’re browsing a static build of the Body IQ knowledge graph, so everything loads with no backend. A few things that need the live server are turned off here:

  • Global search (sidebar) is disabled — it queries the API.
  • The JSON API and the API “Try it” playgroundaren’t included.
  • The data is a snapshot — it refreshes only when the demo is rebuilt, not live from the database.

Everything else — the body map, progression ladders, coverage heatmap, exercise finder, and all anatomy/exercise/source pages — works fully. The full app (live search + API + database) runs from the source on GitHub.

External Intercostals

Inspiratory muscles in dorsal portions. Fibers run inferoanteriorly ('hands in pockets'). Mechanical advantage varies by interspace and rib cage volume.

Draft95%

Anatomy

Origin
Inferior border of rib above (from tubercle to costochondral junction)
Insertion
Superior border of rib below
Action
Inspiratory in dorsal portions; rib elevation at end-expiratory volume; mechanical advantage greatest in dorsal rostral interspaces
Innervation
Intercostal nerves (T1-T11)
Blood Supply
Posterior and anterior intercostal arteries

Movements (1)

MovementJointRoleNotes
Thoracic ExtensionThoracic Intervertebral JointsSynergistRib elevation during inspiration; assists trunk extension

Exercises (8)

ExerciseRole
Lateral Costal BreathingPrimary
Box Breathing (4-4-4-4)Synergist
Cyclic Sighing (Physiological Sigh)Synergist
4-7-8 BreathingSynergist
Ujjayi Breathing (Ocean Breath)Synergist
Child's Pose BreathingSynergist
Crocodile Breathing (Prone Diaphragmatic)Synergist
Pursed-Lip Diaphragmatic BreathingSynergist

Sources