Physiology 3120 Lecture Notes - Postcentral Gyrus, Central Sulcus, Evoked Potential

53 views1 pages

indigoweasel955

26 Nov 2011

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Somatosensory system ii: somatosensory cortex located in the post-central gyrus (posterior/caudal to the central sulcus, properties (each hemisphere is organized this way) (1) somatotopic organization. Leg (medial) trunk arm face (lateral) This organizational structure is called a homunculus ( little man : distorted because of differences in density of receptors in a certain body part (highest in fingers & lips); more sensitive areas take up more cerebral surface area. Present at birth, but also shows cortical plasticity: example: Braille, the hand area of the cortex will expand someone who is born sighted, but later become blind & use to learn (2) columnar organization. All neurons in a column of cortex have very similar properties: modality-pure (particular type of receptor) on the same part of the body, faithful transmission.

Related Questions

The immediate cause of many deaths is ventricular fibrillation, anuncoordinated quivering of the heart, as opposed to proper beating.An electric shock to the chest can cause momentary paralysis of theheart muscle, after which the heart will sometimes start organizedbeating again. A defibrillator is a device that applies a strongelectric shock to the chest over a time of a few milliseconds. Thedevice contains a capacitor of a few microfarads charged to severalthousand volts. Electrodes called paddles, about 8 cm across andcoated with conducting paste, are held against the chest on bothsides of the heart. Their handles are insulated to prevent injuryto the operator, who calls. "Clear!" and pushes a button on onepaddle to discharge the capacitor through the patient's chest.Assume an energy of 330 W s is to be delivered from a 27.0 ÂµFcapacitor. To what potential difference must it be charged?

The immediate cause of many deaths is ventricular fibrillation, an uncoordinated quivering of the heart, as opposed to proper beating. An electric shock to the chest can cause momentary paralysis of the heart muscle, after which the heart will sometimes start organized beating again. A defibrillator is a device that applies a strong electric shock to the chest over a time of a few milliseconds. The device contains a capacitor of a few microfarads charged to several thousand volts. Electrodes called paddles, about 8 cm across and coated with conducting paste, are held against the chest on both sides of the heart. Their handles are insulated to prevent injury to the operator, who calls. "Clear!" and pushes a button on one paddle to discharge the capacitor through the patient's chest. Assume an energy of 320 W s is to be delivered from a 33.0 µF capacitor. To what potential difference must it be charged?

A Particle in a box
In order to answer the following questions you will need toconsideran infinite potential
well of length L, in which a particle has been confined.

1. For principal quantum number n=7, write code to calculatethenormalization constant.
Then, plot the probability density function for this state (usingL= 10).
2. Using the properly normalized wave equation from Question1,write code to determine
the expectation values <x> and <x2> . Is <x>oneof the most probable positions? Explain
why.
3. Using the properly normalized wave equation from Question1,write code to determine
the expectation values <p> and <p2> . Show the valueyouobtain for <p2> is equal to
2mE7 (where E7 is the energy of the n = 7 level). Remember that pisa differential
operator so you will have to use the diff command.
4. The uncertainty of a quantum measurement is defined on page222,Equation 6.41 (3rd
edition SMM). Using this equation calculate the uncertainties oftheposition and
momentum of a particle in the n = 5 state. Compute the productofthese uncertainties and
compare this with the prediction of the Heisenberguncertaintyprinciple.
Quantum oscillator
5. Repeat calculations in the previous question for the groundstatewave function of the
quantum oscillator. Comment on the obtained result.

Physiology 3120 Lecture Notes - Postcentral Gyrus, Central Sulcus, Evoked Potential

Document Summary

Get access

Related Documents

Physiology 3120 Lecture Notes - Lecture 5: Cortical Column, Muscle Spindle, Dura Mater

Physiology 3120 Lecture Notes - Lecture 20: Stretch Reflex, Brainstem, Reticular Formation

Physiology 3120 Lecture Notes - Wilder Penfield, Precentral Gyrus, Somatotopic Arrangement

Related Questions