30 october 2009
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30 October 2009. Pick up 1QQ from Wednesday Pick up answer sheet for today’s 1QQ Today’s Lecture : Ch. 10 Control of Movement Demo of SPSS for Statistical Analysis - PowerPoint PPT PresentationTRANSCRIPT
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30 October 2009
Pick up 1QQ from WednesdayPick up answer sheet for today’s 1QQToday’s Lecture: Ch. 10 Control of MovementDemo of SPSS for Statistical AnalysisMonday’s Test # 2: Approx numbers of MC questions:20 Sensory, 15 Muscle, 10 Hearing, 3 Equilibrium, 15 Visual, 8 Autonomic, 15 Synapses
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Fig. 10.01
Reflex
“Volunteer motives”
Initiates motor command
Coordinates secondary movements
Balance and complex learned
movementsPathways?
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Local control
• Muscle spindle– Stretch receptor– Intrafusal muscle fiber
• What is their role?• Lets look at a stretch
reflex…– Follow the reflex arc– Be able to differentiate
function of afferent fibers, alpha motor neurons, and gamma motor neurons
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Fig. 10.05ab
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Fig. 10.05c
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Fig. 10.06
Stretch reflex is monosynaptic
Most common example: patellar reflex = “knee jerk reflex”
Proprioception pathway via dorsal column-medial lemniscus pathway
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Fig. 10.07
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Golgi tendon organs involved in a reflex to
oppose excessive muscle tension.
Not monosynaptic.
Not shown: ascending axons in dorsal column-medial lemniscus tract.
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Joint angle detectors and cutaneous mechanoreceptors contribute to sense of body position (proproiception.)
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Fig. 10.01Initiates motor command
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Fig. 10.12Pyramidal tract
Extra-Pyramidal tracts
Not monosynaptic!
Reticulospinal tractVestibulospinal tract
Corticospinal tractCorticobulbar tract
Fine motor control, esp. of extremeties
Originate in brainstem,more involved with posture and equilibrium
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