mastication and ingestion Flashcards
what are the 4 stages of the chewing cycle?
opening
fast closing
slow closing
intercuspal phase
in what phase of the chewing cycle is food broken down?
slow closing
which phase of the chewing cycle?
opening
which phase of the chewing cycle?
fast closing
which phase of the chewing cycle?
slow closing
which phase of the chewing cycle?
intercuspal phase
what direction of rotation do we chew?
lateral to medial circles
which condyle is the working side?
what is a Bennett movement? 2
condyle rotates around vertical axis
moves laterally
what is a Bennet angle? 3
condyle moves downwards
forwards over articular eminence
medially
what happens to the working and non-working condylar head during opening?
working side -> Bennett movement
non-working side -> Bennett angle
what happens to the working condylar head during closing?
moves medially to normal position in glenoid fossa
rotates back to normal orientation
what happens to the non-working condylar head during closing?
moves upwards, backwards and laterally
returns to normal position in glenoid fossa
what muscles are activated during opening in order of sequence of activation? 3
mylohyoid
digastric
lateral pterygoid
what muscles are activated during closing in order of sequence of activation? 3
temporalis
masseter
medial pterygoid
(lateral pterygoid also active)
name this area that controls mastication
higher centres
name this area that controls mastication
central neural pattern generator
“chewing centre”
name this area that controls mastication
motor nucleus
name this area that controls mastication
reflexes
what are the movement stages of food before swallowing?
transport to posterior teeth
transport to back of tongue
what are the phases of a command swallow?
oral
pharyngeal
oesophageal
what is oesophageal peristalsis?
unidirectional wave of muscle contraction in a tubular organ
what are the 3 phases in swallowing solid food?
preparatory phase
pharyngeal phase
oesophageal phase
