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23 year old male with Clostridium tetani (Background (Excitation…
23 year old male with Clostridium tetani
Upstream
Direct
tetanospasmin blocks neurostransmiter
without neurotransmitter, muscles spasm
Indirect
Didn't check for clean needles
Sketchy Tattoo place
not vaccinated for bacteria
Background
Structural/ Functional class of Neurons
Unipolar
one extension off neuron body
Bipolar
2 extensions off body
Multipolar
multiple extensions off body
Sensory (Afferent)
transmit impulses from receptors toward CNS
interneurons
conduct impulses from CNS, predict motor output
Motor (Efferent)
Carry impulses away from CNS
Excitation contraction coupling
Motor Neurons release ACh
Chemically gated Na channels open
muscle fiber membrane depolarizes
voltage gated calcium channels open
calcium binds to troponin
tropomyosin unblocks myosin-binding cites
myosin attaches to actin
Process of summation
no- summation
slowly firing presynaptic neuron, EPSPs are far apart
temporal summation
rapid firing presynaptic neuron, EPSPs are close
Spatial Summation
more than one presynaptic neuron firing at one time, EPSPs are in different locations
Postsynaptic Proteins
Excitatory
Sodium channels
Depolarize the membrane
Inhibatory
potassium and Chloride
hyperpolarize the membrane
Clostridium tetani (Tetanospasmin)
Bonds at presynaptic terminals
Transported (motor) to spinal cord
transferred to inhibitory presynaptic terminals
destroys vesicular synaptic membrane protein
inactivates neuron that suppresses muscle activity
increased excitability
widespread intoxication
Organ Systems
Cardiovascular
pumps blood through the body
Muscular system
aids in movement
nervous system
reacts to stimuli
respiratory
gas exchnage
skeletal system
bodies framework
Downstream
Organ Systems
Cardiovascular
Abnormal heart rhythm
Muscular system
Muscle spasms/ convulsion
can lead to bone fractures with strong muscle spasm
Nervous system
tetanospasmin interferes with signals
signals don't get to the brian
Respiratory
breathing problems
vocal cords spasm
pneumonia
brain damage, lack of oxygen
skeletal
bones break due to convulsions