Reflexes - Motor Response PDF

I Reflexes: Reflexes Autonomic visceral involve...

I Reflexes: Reflexes Autonomic visceral involve organs movement: integration of censory info: involuntary response - spine brain butmodulated by key feature-negative feedback (stops responses INs (e.g. pee=learned reflex -some reflexes have feedforward:anticipate r -integrated in hypothalamus, ↳e.g. see food-digestive activity starts thalamus brain stem can be emotional reflex:hair L ~ stands when scared epiloerection somatic autonomic -tonic activity:continuous control (blood vessels) Iskeletal) Ismooth cardiac nextpage 4-antagonistcontrol muscle, gland, adiposel autonomic reflexes: in CNS 31 in ganglion synapse polysynaptic & spinal reflex brain cranial reflex:brain 9 * innate:genetically determined (born with learned:acquired through experiencel conditioned ↳ uses association. * monosynaptic=2 neurons, I sensory effector =only somatic motor polysynaptic:itinterneurons :autonomic reflexes, I afferent 32 efferent ~ somatic motor reflex: ~Somatic Motor reflex: -> skeletal / extrafusal muscle --- somaticl < In - motor neuron ↑ - 2 synapses  2 Antagonistic control: skeletal muscle reflexes cont: - proprioceptors in skeletal muscle, jointcapsules ligament - ↳ carry inputsensory neurons to CNS integrates signal ↳ CNS 5 somatic motor neurons carry output:alphd motor neuron ↳ Skeletal effectors: Muscle fiber/extrafusal muscle fiber * 3 types ofproprioceptors 17 muscle spindle sensory receptor in muscle. 2) Golgi tendon organ 3) jointreceptors in - capsules ligaments ofjoints, fast adapting, signal joint Skeletal muscle Reflexes: angle, integrated in cerebellum I read. - excitation of somatic motor ALWAYS:contraction ↓Muscle spindle:I stretch receptors:stretch reflex S E V -I S ↳ofmuscle spindle inhibitory neuron :relaxabsence of excitatory neuron inhibitory interneuron in CNS inhibit -. somatic motor neuron * NO antagonistic effectbut rather inhibitory!  3 muscle spindle:maintain muscle tone Motor Neurons: * WithoutGamma ↳ firing even when muscle relaxed -trafusal ~actual muscle. & also preventoverstretching by monitoring muscle length -> thick 3 thin filaments attension & lose fine motor skills =>⑦ intra extra extra contracts ↑ Stretch I & A 1St. Alpha-Gamma co-activation -> maintain spindle function -muscle contracts:shorten when alpha motor fires simultaneous end ofmuscle -gamma motor neuron innervates muscle fibers at spindle : spindle:stretched 3 active example :spindles tarts able to detectchanges in stretch p 2 3  symptoms: 4 movement voluntary - e Grrr ⑱ ⑧ +O2 +op ⑧ TOP r  S Golgi Tendon organs:a sense muscle tension, involved in relaxation ↑ reflex & 2 limbs ↑ monosynaptic c. reciprocal inhibition Cantagonist ↳ polysynaptic reflex tension path know * protects muscle: path 2 * *steps!! x(fexor)