cognitive neuroscience: study of the physiological basis of cognition · Levels of analysis levels of analysis: topic can be studied in ways each contributing its own dimension to the understanding . Neurons neurons: & specialized to create, receive & transmit info in the mercove system neuron doctrine : idea that individual &s transmit signals in the nervous syst & one X continuous -Cel boty each neuron has. & body: metabolic center of the neuron: contains mechanisme to keep a alive Swaston dendrites: branch out from a body of receive signals from other neurons Choce akons/ nerle fibers: transmit signals to other neurons Synapse: gap between end of 1 & beginning of other neuron neural circuits nerce nets: groups of interconnected neurons receptors: specialized nevrons that have specialized receptors that pick up info from the un · Signals that travel in neurons Figure 2.4 lol Basic components of a neuron in the cortes. (bl A neuron with a Specialized receptor is place of the cel body. Thisrecepcor responds to pressure on the din. The interconnections of neurons create a nerve net, which is like a continuous network that is similar to a highway . One street connects to another but without stop signs . This allows for almost nonstop, continuous communication of signals throughout the network . Contradicted by the neuron doctrine . Ramon y Cajal · Individual nerve cells transmit signals, and are not continuous with other cells microelectrode. shafts of hollow glass Filled with a conductive salt solution that can pick up electrical signals of the electrode hp & conduct them to a according device -- wat forell editores in charge, club the kronosin dungs between the recording are . resting potential: - 70 ml (X signals in the neuron) nerups neuron recepter is stimulated, nerve impulic transmitted down the = action potential : + 40ml (-1 mac) · Action potential · Neuron receives signal from environment · Information travels down the axon of that neuron to the dendrites of another neuron AX change in height or shape of action potential + Measuring action potentials · Microelectrodes pick up electrical signal . Placed near axon + Active for ~- 1 second neurotransmitters: released chemical at the end of akon in synapse + stimuli as of sale of nerve Firing, but - size & shape of action potential magnitude of an experience is intensity of stimulation as rate of neural firing => How can serce impulses stand for + qualities ( within & accross suger) ? & qualities of stimuli activate of neurons & are as in the brain
· Representation by neural firing principle of neural representation: everything a person experiences is based on representations in the person's nervous system · Feature Detectors : Hubel & Wiesel Feature delectrons: respond to specific stimulus features such as orientation, movement of length (perception) experience-dependent plasticity: structure of the brain is changed by experience · Neurons that respond to complex stimuli neurons in i visual cortex: simple stimoli (oriented bors) temporal lobe.