Development of Spatial Representations Flashcards
What are place cells and where are they found?
Only fire when in certain part of environment - place field
In hippocampus - CA1 to CA3
What are the 2 sources of positional information?
Landmark cues
Self motion cues
What are landmark cues?
External to body - e.g. vision, olfaction
What are self motion cues?
Internal to body - e.g. vestibular, proprioception, motor efference copy
What is allothetic navigation?
Navigation guided by external cues - relies on landmark cues
What is path integration?
Navigation without outside cues - relies on self motion cues
What are head direction cells and where are they found?
Active when head points in specific direction
In extended network - projects to hippocampus
What are head direction cells controlled by?
Visual and internal cues
What are place cells controlled by?
Visual and internal cues
What are grid cells and where are they found?
Each has regular series of equally-spaced zones in every environment
Code for distance moved
In parahippocampal cortices
What are the sensory abilities of mice at birth?
Deaf Blind Basic vestibular system Olfaction Tactile sense only in oro-facial area
What is the first type of navigation neural circuit to develop and when does this occur in mice?
Head direction cells
At P12
What is the second type of navigation neural circuit to develop and when does this occur in mice?
Place cells
At P16
What is the third type of navigation neural circuit to develop and when does this occur in mice?
Grid cells
At P21
What causes the maturation of head direction cells and how rapidly does this occur?
Eye opening - onset of vision
Rapid
