OMM
Name the stuck position, restore the missing motion, and stop confusing the hand contact with the direction the rib needs to move.
Commit before the lesson
Rib 4 is held in the exhaled position and fails to rise during inhalation. The question asks for the posterior contact and thrust vector used in the board-style setup.
Reason it through
The moving part of the rib determines how the posterior setup works.
Pump-handle ribs 1-5 primarily move at their anterior ends. The anterior rib rises during inhalation and falls during exhalation, changing the anterior-posterior diameter of the chest.
Bucket-handle ribs 6-10 primarily move at their lateral portions. The lateral rib moves up and out during inhalation and down and in during exhalation, changing the transverse diameter.
Ribs 11-12 move mainly as calipers because they lack an anterior attachment. The four-row posterior contact map on this page applies to pump and bucket mechanics, not caliper ribs.
Which portion of each rib group carries the dominant motion?
The anterior rib ends rise during inhalation and fall during exhalation. That forward lift increases anterior-posterior chest diameter.
Upper anterior chest clue → pump handle → ribs 1 to 5.
Pump is anterior. Bucket is lateral. Caliper is free.
Ease names the dysfunction. Restriction tells you what to restore.
An inhalation dysfunction is stuck up in the inhaled position. The rib rises but fails to descend fully during exhalation, so treatment must restore downward motion.
An exhalation dysfunction is stuck down in the exhaled position. The rib falls but fails to rise fully during inhalation, so treatment must restore upward motion.
The common trap is naming the dysfunction after the blocked motion. A rib that cannot exhale is not named exhalation dysfunction. It is stuck up and is therefore an inhalation dysfunction.
A rib moves down freely but fails to rise. What is the diagnosis?
The name tells you where it lives, not where it cannot go.
Six decisions turn the four-row spreadsheet into one mechanical rule.
Start with the diagnosis and translate it into position. Inhalation dysfunction means stuck up. Exhalation dysfunction means stuck down.
Next identify the missing motion. Stuck up needs downward motion restored. Stuck down needs upward motion restored.
For a group, use BITE before choosing the setup. The Bottom rib is key in an Inhalation dysfunction, and the Top rib is key in an Exhalation dysfunction.
Run the board-question algorithm in order.
Name equals stuck. Pump flips. Bucket follows.
Rib 1 is special, grouped ribs use BITE, and floating ribs stay individual.
Rib 1 is commonly tested with inhalation dysfunction because the anterior and middle scalenes attach to it and can hold it elevated. Treat it as an individual upper rib after screening the patient.
Ribs 2-5 are primarily pump-handle ribs and ribs 6-10 are primarily bucket-handle ribs. When several adjacent ribs share one dysfunction, identify the key rib before selecting the treatment setup.
Ribs 11-12 lack an anterior attachment and move in a caliper pattern. Assess and treat them individually rather than forcing them into the four-row pump-and-bucket map.
Open the old high-yield rib groups, updated.
Pump-handle upper rib. The anterior and middle scalenes insert on rib 1, so an elevated rib 1 often travels with scalene tension.
Screen the neck, thoracic inlet, and rib before treating.
Pump-handle group. The posterior scalene inserts on rib 2, and the pectoralis minor can serve as a muscle-energy lever for ribs 3-5.
Bucket-handle group. Serratus anterior is a useful lever for ribs 6-8 and latissimus dorsi for ribs 9-10 in a supervised muscle-energy setup.
Floating caliper ribs. No anterior attachment means each rib is localized and treated individually.
Rib 1 is special. Grouped ribs use BITE. Floating ribs stay individual.
Keep the old elimination drill. It proves the rule instead of merely reciting it.
In a group inhalation dysfunction, the ribs are held up and cannot descend. The bottom rib is the key rib because it must move down before the ribs above it can follow.
In a group exhalation dysfunction, the ribs are held down and cannot rise. The top rib is the key rib because it must move up before the ribs below it can follow.
Ribs 7-10 rise freely but fail to descend on exhalation. Reveal the clues, then eliminate the wrong chart diagnosis and key rib.
BITE means Bottom Inhaled, Top Exhaled.
The contact landmark and the desired rib motion are related, but they are not identical.
In the posterior-angle board setup, first identify the posterior rib angle and then choose its superior, inferior, or inferolateral aspect from the rib group and dysfunction.
Pump-handle questions feel reversed because the posterior angle moves opposite the anterior end. Bucket-handle questions follow the lateral motion more directly.
Open each posterior contact landmark.
The hand contact is the fulcrum, not a label for the target motion.
Each row starts with the stuck position and ends with one contact-vector pair.
Pump exhalation dysfunction is stuck down and needs upward motion. Contact the superior posterior rib angle and thrust caudad.
Pump inhalation dysfunction is stuck up and needs downward motion. Contact the inferior posterior rib angle and thrust cephalad.
Bucket exhalation dysfunction is stuck down and needs the lateral rib to move up and out. Contact the inferolateral posterior rib angle and thrust cephalad.
Bucket inhalation dysfunction is stuck up and needs the lateral rib to move down and in. Contact the superior posterior rib angle and thrust caudad.
Reveal each contact and thrust pair.
Stuck down. Restore up. Superior posterior angle. Thrust caudad.
Stuck up. Restore down. Inferior posterior angle. Thrust cephalad.
Stuck down. Restore up and out. Inferolateral posterior angle. Thrust cephalad.
Stuck up. Restore down and in. Superior posterior angle. Thrust caudad.
Pump flips. Bucket follows.
Reveal the force direction only after you have solved the mechanics.
A caudad thrust appears in pump exhalation dysfunction and bucket inhalation dysfunction. A cephalad thrust appears in pump inhalation dysfunction and bucket exhalation dysfunction.
These vectors describe a specific posterior-angle board setup. Actual HVLA technique requires supervised hands-on training, informed consent, localization, and reassessment.
Do not apply rib HVLA over an acute fracture, severe bone fragility, metastatic bone disease, or another condition that makes a thrust unsafe. Choose a gentler technique when direct thrust is inappropriate.
Reveal whether each posterior thrust is caudad or cephalad.
Solve the anatomy before choosing the vector.
Restore the missing motion, but do not collapse respiratory assist, muscle energy, rib raising, and HVLA into one imaginary protocol.
For a group inhalation dysfunction, identify the bottom key rib and engage the exhalation barrier. In the cited muscle-energy sequence, the patient inhales, then exhales deeply and holds at end-expiration for 3-5 seconds while the physician maintains caudad pressure so the rib does not return toward inhalation.
For an exhalation dysfunction, the rib is held down and the goal is upward motion. Select the top key rib, then use inhalation and the appropriate rib-elevator lever: scalenes for ribs 1-2, pectoralis minor for ribs 3-5, serratus anterior for ribs 6-8, and latissimus dorsi for ribs 9-10.
Rib raising is a passive articulatory option at the posterior rib angles. HVLA is a separate direct technique. Consent, localization, contraindication screening, and reassessment belong to every hands-on protocol.
Open the restored treatment protocols.
Restore exhalation and downward motion at the bottom key rib.
The exact patient effort varies with the taught setup. Do not substitute a memorized breath cue for localization.
Restore inhalation and upward motion at the top key rib.
Ribs 1-2 use scalene leverage, 3-5 pectoralis minor, 6-8 serratus anterior, and 9-10 latissimus dorsi.
A passive articulatory technique using repetitive gentle pressure at the posterior rib angles to improve motion and reduce parathoracic restriction.
A supervised HVLA setup localized to the posterior rib angle. Solve the diagnosis, key rib, contact, and vector before setup.
Use a gentler indirect, myofascial, rib-raising, or respiratory-assisted approach when a thrust or active effort is unsafe or poorly tolerated.
Acute fracture, severe fragility, recent spinal injury, active infection, metastatic disease, inability to participate, or refusal changes the plan.
Diagnose the stuck position, then choose a technique that restores the restriction.
One case for every cell in the contact and thrust map.
Rib 3 remains depressed and fails to rise during inhalation. The examiner identifies a pump-handle exhalation dysfunction.
Reason it through
Rib 5 stays elevated and fails to descend during exhalation. The examiner identifies a pump-handle inhalation dysfunction.
Reason it through
Rib 8 stays low laterally and fails to rise and move out during inhalation. The examiner identifies a bucket-handle exhalation dysfunction.
Reason it through
Rib 9 stays elevated laterally and fails to move down and in during exhalation. The examiner identifies a bucket-handle inhalation dysfunction.
Reason it through
PGY-1 Resident Physician in Psychiatry
University Hospitals, Columbia
DO from Kansas City University
Resident physician and founding medical reviewer at Bone Wizardry, focused on clinical accuracy, clear diagnostic reasoning, and practical board-oriented teaching across the curriculum.
Languages: English, Urdu
Medically reviewed
Bone Wizardry is a study resource for medical students. It is not medical advice.
