BioCog 5B movement control Flashcards
1
Q
extrafusal muscle fibres
A
- directly attached to bone
- controlled by alpha motor neurons
2
Q
intrafusal muscle fibres
A
- make up the muscle spindle
- wrapped in afferent fibres = free nerve endings
- activated by gamma neurons
3
Q
golgi tendon organ
A
- detects stretch
- lies where the spindle is attached to the bone
4
Q
weight dropped on hand
A
- GTO and MS detect whether it is to heavy or not
- if not arm is put back into place
5
Q
myofibrils
A
- in extrafusal muscle fibres
- made up of actin and myosin
- myosin builds heads that move by stick, sliding along and releasing from actin strands
6
Q
polysynaptic inhibitory reflex
A
- GTO sends signal of too much tension to
- dorsal root ganglion to
- gray matter of spinal cord
- inhibitory interneuron inhibits
- alpha motor neuron sends inhibitory signal via
- ventral root to
- extrafusal muscle fibres
7
Q
doping
A
- f.e. done by sedating the GTO
8
Q
lateral group
A
- for independet limb movements
9
Q
ventromedial group
A
- for balance, body posture and walking
10
Q
cerebellum
A
- processes motor coordination
- distribution of muscles, timing
11
Q
dentate nucleus and thalamus
A
- get info from cerebellum to cortex
12
Q
ponatate nucleus
A
- gets info from cortex to cerebellum
13
Q
damage in cerebellum
A
- problems timing movements
- tremors
- especially at the end of movements
14
Q
information processing for motor
A
- parietal for space, temporal for audition and memory, occipital for visual and plans from prefrontal
- tranfered to both supplementary and premotor cortex
- motor cortex
15
Q
supplementary motor cortex
A
- sequences of movements
- SMC
