Lecture 21 - Brains Flashcards
What are the three parts of a typical neuron?
axon
dendrites
cell body (soma)
What are the different kinds of brain maps?
Somatosensory
Visual pathways
Mapping sound
What is the path of a typical reflex arc?
Sensory neuron -> Interneuron -> Motor neuron -> Effector
In order for a neuron to be triggered it has to?
depolarize enough to reach the threshold
Monosynaptic reflex arc
simplest network possible. goes straight from sensory to motor neuron no interneuron.
Polysynaptic reflex arc
reflex arc that does involve interneuron
What are the two ways of processing and integrating neuron signals?
Feed forward and Feed back neural circuits
feed forward convergence
take information from multiple neurons to a single neuron
feed forward divergence
information from one neuron splits across multiple neurons.
what are the two kinds of feedback
feedback inhibition(reduce signal) positive feedback(increase signal)
What are the different levels of Nervous system organisation?
Network (no ganglia)
Ventral ladder (ganglia)
Dorsal tube (enlarged frontally)
Encephalisation: Brain
What is the enlarged mass at the end of the Dorsal nerve cord
brain
What are the primary vesicles of brain?
Prosencephalon (forebrain)
mesencephalon (midbrain)
rhombencephalon (hindbrain)
spinal cord
What are the major divisions of the tripartite brain?
Forebrain
Brainstem
- Midbrain
- Hindbrain
what is the purpose of the cerebellum?
motor coordination