Flashcards in Chapter 9 Cranial Intro Deck (20):
What is the primary respiratory mechanism (PRM)?
CNS + CSF + dural membranes + cranial bones + sacrum
What do the brain and spinal cord do during exhalation phase of PRM?
Lengthen and thins
What do the brain and spinal cord do during inhalation phase of PRM?
Shortens and thickens
What is normal cranial rhythmic impulse (CRI)?
What decreases CRI?
Stress, depression, chronic fatigue and chronic infections
What increases CRI?
Vigorous exercise, systemic fever, following OMT to the craniosacral mechanism
What forms the falx cerebri and tentorium cerebelli?
Where does the dura attach?
Foramen magnum, C2, C3, S2
The dura is elastic or inelastic?
Inelastic--when the dura moves, the cranial bones move
What is the reciprocal tension membrane (RTM)?
Mvt of meninges cause cranial motion--called an automatic, shifting, suspension fulcrum
Where does the dura attach to the sacrum?
POSTERIOR superior aspect of S2 (this is where the superior transverse axis runs that allows sacral motion)
What is the sphenobasilar synchondrosis (SBS)?
Articulation of sphenoid with occiput
Motions of SBS?
Flexion and extension
IRE of ERF?
Internal rotation of paired bones occur with extension of midline bones; external rotation occurs with flexion
What are the midline bones?
Sphenoid, occiput, ethmoid, vomer
What causes counternutation?
Flexion (widen head and decrease AP diameter)
Extension (narrow head and increase AP diameter)
What causes nutation?