Memory

258 views

Published on

cns: memory by rmc student

Published in: Technology, Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
258
On SlideShare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
3
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Memory

  1. 1. DEFINATION: Memory is the storage of acquired knowledge for later call. MEMORY TRACES: Memory is stored in brain by changing basic sensitivity of synaptic transmission b/w neuron as a result of previous neural activity . The new or facilitated pathway are c/d memory traces .
  2. 2.  POSITIVE MEMORY: Information causes important consequences such as pain or pleasures.  NEGATIVE MEMORY: Brain has capability to learn to ignore information that is of no consequence. OTHER TERMS ARE: HABITUATION. SENSITIZATION.
  3. 3.  EXPLICIT : Also c/d DECLARATIVE memory , associated with consciousness.  DIVIDED INTO EPISODIC: Memory for events. SEMANTIC : Memory for facts , words rules etc.  IMPLICIT: Also c/d non declarative , doesn’t involve consciousness. It include skill , habit ,conditioned reflexes.
  4. 4.  Explicit Memory and many forms of implicit memory involve the temporary storage of information in working or short memory which lasts for few seconds or minutes.
  5. 5.  SHORT TERM: Memory lasts for seconds or at most minutes. Example: One’s memory of 7 to 10 numerals in a phone number for a few sec/min.  INTERMEDIATE LONG TERM: Memory lasts days to week .  LONG TERM MEMORY: Memory once stores ,can be recalled up to years.
  6. 6. 1 • Noxious stimulus. 2 • Release of serotonin from facilitating inter neuron. 3 • ↑ Cyclic AMP in presynaptic neuron. 4 • Blockage of K+ channels in presynaptic neuron. 5 • Prolongation of action potential in presynaptic neuron.
  7. 7. 6 • Ca2+ channels in presynaptic neuron kept open longer. 7 • Ca2+ influx. 8 • ↑ Output of transmitter from presynaptic neuron. 9 • ↑ Post synaptic Potential in efferent neuron. 10 • Enhanced Behavioral response to stimulus.
  8. 8. 1 • Repetitious indifferent stimulus. 2 • Closing of Ca2+ channels in presynaptic neuron. 3 • Ca2+influx ↓ 4 • ↓ Output of transmitter from presynaptic neuron. 5 • ↓ Post synaptic Potential in efferent neuron. 6 • Reduced behavioral response to indifferent stimuli.
  9. 9.  ↑ in vesicle release sites for secretion of transmitter substance.  ↑ in number of transmitter vesicle released.  ↑in number of presynaptic terminals .  Change in structures of the dendritic spines that permit transmission of stronger signals
  10. 10. Anterograde Amnesia. Retrograde amnesia .

×