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Primary and Secondary Respiration Primary and Secondary Respiration Raymond J. Hruby, DO, MS, FAAO
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Mar 20, 2018

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Page 1: Primary and Secondary Respiration - Academy offiles.academyofosteopathy.org/.../Hruby-PrimarySecondaryRespiration… · • Primary Respiratory ... • Secondary Respiratory MechanismSecondary

Primary and Secondary RespirationPrimary and Secondary Respiration

Raymond J. Hruby, DO, MS, FAAO

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Objectivesj

• Define:• Primary Respiratory Mechanism (PRM)• Secondary Respiratory Mechanism• Secondary Respiratory Mechanism

(SRM)Di R l ti hi B t PRM d• Discuss Relationships Between PRM and SRM

• How are they related?• Where do they meet?y• What is the clinical significance of

this interrelationship?this interrelationship?

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Primary Respiratory Mechanism 

• Primary –underlying all other physiologic• Primary –underlying all other physiologic functions

• Respiratory –concerned with cellular respirationrespiration

• Mechanism –cranial articulations and l i t ti b t thsacral respiratory motion between the 

ilia

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Anatomy and Physiology of the PRMAnatomy and Physiology of the PRM  

• Structural components:

• Cranial articular mechanism• Cranial articular mechanism 

• Intracranial and intraspinal membranes

• Sacrum• Sacrum 

• Functional components:

CSF• CSF 

• Inherent motion of the CNS

I h t t• Inherent potency 

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C i lStructure

Cranial ArticularM bilit

SacralReciprocal

Mobility

Sacral Respiratory

Motion

pTension

Membrane MotionPrimary

RespiratoryMechanism

OSTEOPATHICSTRUCTURAL

EXAMEXAM

CSFFluctuation

CNS MotilityFluctuation Motility

Function

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Secondary Respiratory Mechanism (SRM)

• SECONDARY – dependent on the PRM

• RESPIRATORY – concerned with alveolar i irespiration

• MECHANISM – includes anatomic structures f l t l li l i l dfrom nasal passages to alveoli; also includes rib cage and diaphragms

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Anatomy and Physiology of the Secondary Respiratory MechanismSecondary Respiratory Mechanism 

(SRM)

• Structural components– Nasal passages– Pharynx– Larynx– BronchiBronchi– Lungs– Thoracic cage– Thoracic cage– Diaphragms: throracoabdominal, pelvic, cranialcranial

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Anatomy and Physiology of the Secondary Respiratory Mechanism (SRM)

• Functional components:

• Concerned with thoracic (alveolar) i tirespiration

• O2 – CO2 transfer mechanismO2 CO2 transfer mechanism

• Intimately connected to other body systems such as cardiovascular, neurological musculoskeletalneurological, musculoskeletal

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Commonalities Between the Two Systemsy

Vit l t lif• Vital to life

• Phasic in naturePhasic in nature

• Respond to metabolic demands

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Some Possible PRM-SRM Relationships

• Both have spontaneous excursions

• Can be in or out of phase with each other

Th i l t d f hi ith• They can move in an unrelated fashion, with the PRM typically slower

• SRM can enhance PRM or assist with treatment of PRM – for example use oftreatment of PRM  for example, use of respiratory cooperation

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Some Possible PRM-SRM Relationships

• The PRM is constant and stable• The SRM is more prone to modulation andThe SRM is more prone to modulation and adaptation to the environment

• The SRM adjusts to the external atmospheric• The SRM adjusts to the external atmospheric conditions to meet the needs of  the internal metabolic processes including the PRMmetabolic processes, including the PRM.

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Some Possible PRM-SRM Relationships

• Restriction of motion of cranial bones, and/or cranial thoracic and pelvicand/or cranial, thoracic and pelvic diaphragms can alter PRM amplitude and ffrequency

• SRM can be used to influence PRM

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Some Possible PRM-SRM Relationships

• The PRM continues as long as life persists

Th SRM b i t t d t d• The SRM may be interrupted or stopped, and resumed through forceful manipulation of the temporal bones

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An Interesting Analogy?g gy

• The PRMmay be compared to the rise• The PRM may be compared to the rise and fall of the oceanic tide

• The SRM may be thought of as the waves of the ocean water that arise from andof the ocean water that arise from and respond to environmental changes

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Where do the PRM and SRM meet?Where do the PRM and SRM meet?

• Some examples:Temporal bones– Temporal bones

– Occiput and/or Sacrum

– Neurological control system for respiration

– The core link and the three diaphragmsp g

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Where do the PRM and SRM meet?Where do the PRM and SRM meet?

• PRM initiates and maintains activity of CNS yrespiratory centers.

Th CNS t th d i th ti f th• These CNS centers then drive the action of the SRM components.

• Provides a “pathway” for the influence and action of the inherent potency of the PRMaction of the inherent potency of the PRM.

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Temporal Bones

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Temporal Bones

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Occiput and SacrumOcciput and Sacrum

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Connection to the Neurological SystemConnection to the Neurological System

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Neural Control of RespirationNeural Control of Respiration

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Connection to the Musculoskeletal SystemConnection to the Musculoskeletal System 

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The Core Link and the Three Diaphragms

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What is a Diaphragm?p g

• A connective tissue septum which divides a body cavity into superior and inferior compartments.  p

• This septum is attached at its periphery to a mobile part of the bony skeleton and ismobile part of the bony skeleton and is subject to rhythmic motion related to the phases of respiration.

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Cranial Diaphragm

Superior View of the Tentorium Cerebelli

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Thoracoabdominal DiaphragmThoracoabdominal Diaphragm

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Pelvic DiaphragmPelvic Diaphragm

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Connection to the Cardiovascular SystemConnection to the Cardiovascular System

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ANOTHER THOUGHT…

Consider the extensive nature and function of fascia

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Another ThoughtAnother Thought

• H. Langevin. Connective tissue: A body‐wide signaling network? Medical Hypotheses, Volume 66, Issue 6, Pages 1074‐1077.g

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Another ThoughtAnother Thought

• Unspecialized ‘‘loose’’ connective tissue forms an anatomical network throughout the body.  The hypothesis is that, in addition, connective tissue functions as a body‐widetissue functions as a body wide mechanosensitive signaling network. 

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Another ThoughtAnother Thought

• Three categories of signals are studied: electrical, cellular, and tissue remodeling, each potentially responsive to mechanical forces p y pover different time scales. 

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Another ThoughtAnother Thought

• It is proposed that these types of signals generate dynamic, evolving patterns that interact with one another.interact with one another.

• Such connective tissue signaling would be ff d b h i daffected by changes in movement and posture, and may be altered in pathological conditions (e.g. local decreased mobility due to injury or pain). o ju y o pa )

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Another ThoughtAnother Thought

• Connective tissue thus may function as a previously unrecognized whole body communication system.communication system.  

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Another ThoughtAnother Thought

• Since connective tissue is intimately associated• Since connective tissue is intimately associated with all other tissues (e.g. lung, intestine), 

i i i li h lconnective tissue signaling may coherently influence (and be influenced by) the normal or pathological function of a wide variety of organ systems.systems.

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Another ThoughtAnother Thought

• Demonstrating the existence of a connective signaling network therefore may profoundly influence our understanding of health and gdisease.

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A T Still on fascia:A. T. Still on fascia:

• “This connecting substance must be free at all parts to receive and discharge all fluids, and use them in sustaining animal life, and eject all impurities, that health may not be impaired by dead and poisonous fluids.”

• “By its action we live and by its failure we die.”

• “The soul of man, with all the streams of pure living water seems to dwell in the fascia of his body”water, seems to dwell in the fascia of his body.”

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Clinical CorrelationsClinical Correlations

• Deep inhalation (SRM) can enhance the PRM

– Newborn first breath

• Biomechanical factors – Exercise: try breathing with neck extended vs. flexedneck extended vs. flexed

• Realignment of core link elements (diaphragms)

T l b i fl i ti• Temporal bone influence on respiration

• CV4 technique

• Sutherland’s (and others’) experience with respiratory arrest patient

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B th fBreath of Life

PRM

SRMSRM

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Primary vs Secondary RespirationPrimary vs. Secondary Respiration

PRM• Inherent motility of the brain 

d i l d

SRM• Structural components

– Nasal passagesand spinal cord• Fluctuation of the 

cerebrospinal fluid (potency)

Nasal passages– Pharynx– Larynx– Bronchip (p y)

• Mobility of the intracranial and intraspinal membranesA i l bili f h

– Lungs– Thoracic cage– Diaphragms: throracoabdominal, 

pelvic, cranial• Articular mobility of the 

cranial bones• Involuntary motion of the 

p ,– Respiratory centers in the brain

• Functional components:• Concerned with thoracic (alveolar) 

respirationysacrum between the innominates

respiration• O2 – CO2 transfer mechanism• Intimately connected to other body 

systems such as cardiovascular, neurological musculoskeletalneurological, musculoskeletal

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PHYSIOLOGICPHYSIOLOGIC FUNCTIONS…

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Physiologic FunctionsPhysiologic Functions

• RespirationC ll l– Cellular

– Tissue

• Fluid Exchange– Arterial bloodArterial blood

– Venous blood

– Lymph

– Cerebrospinal fluid

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ReferencesReferences

• Moskalenko, Y. Cerebral pulsation in the closed cranial cavity, Izv Asad Nauk SSSR (Biol) 4:620‐9, 61.

• Sears. Investigations on respiratory motoneurones of the thoracic spinal cord, Progr Brain Res 12:259‐72, 64

• Nelson KE et al.2001 Cranial rhythmic impulse e so et a . 00 C a a yt c pu serelated to the Traube‐Hering‐Mayer oscillation: comparing laser‐Doppler flowmetry and palpation. J p g pp y p pAm Osteopath Assoc, 101(3): 163‐73 

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