#neurophysiology

[indolentinsect]

human physiology notes!

my professor specializes in neurophysiology so she goes hard when we get to the neuro unit. these are some notes i’ve taken during my study time on electrical signals in neurons!

(diagrams on second page are not mine, they are from Pearson)

[science-lover33]

Neurophysiological Symphony: Decoding the Intricacies of Neuronal Action Potentials 🧠⚡️

Salutations, Tumblr scholars! 🎓 Prepare for a cerebral voyage as we delve into the profound intricacies of neuronal communication, spotlighting the ethereal ballet of action potentials! 🌌💫

Introduction:

Neurons, the virtuosos of our nervous system, engage in a sophisticated dialogue facilitated by the nuanced choreography of action potentials. Let us dissect this neurophysiological marvel with precision and finesse. 📚✨

1. The Prelude - Axon Hillock Overture:

Initiation unfolds at the axon hillock, a nexus of decision-making. Voltage-gated sodium channels undergo conformational changes, inducing an influx of sodium ions, thus instigating the critical decision to fire—an orchestration known as the initiation phase. ⚙️⚠️

2. Act I - Depolarization Crescendo:

The ensuing depolarization phase witnesses a surge in membrane voltage, orchestrated by the influx of positively charged sodium ions. This dynamic spectacle disrupts the membrane's resting potential, marking the commencement of the neuronal conversation with unparalleled fervor. 📈🎻

3. Act II - Repolarization Sonata:

Voltage-gated potassium channels, in a harmonious interlude, activate, allowing potassium efflux. Repolarization unfolds gracefully, reinstating the neuron's electrical equilibrium. The meticulous choreography readies the neuron for subsequent engagements. 🚪💨🔄

4. Act III - Hyperpolarization Cadence:

A brief hyperpolarization, an encore of sorts, ensues as potassium efflux persists, momentarily exaggerating the negative membrane potential. This nuanced cadence serves as a poetic pause before the neural narrative resumes. ⬇️🎭

5. Epilogue - Sodium-Potassium Pump Ballet:

In the epilogue, the sodium-potassium pumps elegantly perform their backstage ballet. Sodium is actively extruded, while potassium is ushered back onto the stage, meticulously restoring the resting membrane potential. A harmonious reset concludes this neurophysiological masterpiece. 🔄🔧

Embark on this odyssey through the synaptical intricacies! 🚀🔬

References:

1. Kandel, E. R., Schwartz, J. H., & Jessell, T. M. (2013). Principles of Neural Science.

2. Purves, D., Augustine, G. J., Fitzpatrick, D., et al. (2018). Neuroscience.

3. Bear, M. F., Connors, B. W., & Paradiso, M. A. (2016). Neuroscience: Exploring the Brain.

[pharmagene]

Some diagrams I studied for our neuroanatomy module last semester, from Tortora.

The pictures I used for Anki are below.

[elizabethclasen]

Not to get overly philosophical, but as someone who is deeply fascinated with the brain, I have such a hard time accepting the idea that there isn’t more to us than our bodies. I mostly identify as an agnostic something-or-other, but between studying neurophysiology in school and doing parts work in therapy right now, I am reaffirmed in my uncertainty. How is it that my brain, this brilliant, powerful organ is wanting to use its own energy to learn more about itself? How is it not that something else, something larger, an observer or self or spirit, isn’t the one trying to understand? This keeps me up at night and wakes me early in the morning.

[thefrankshow]

[economicsresearch]

page 180 - my dream job, a roller skating server at a retro diner celebrating an america that has been lost or possibly never was. I was fired because I kept asking people what it was like to be trapped inside a collective national dream.

Also, missed a bunch of shifts, dropped hot fries and cold shakes on a congressman, etc.

That right there is a nice looking cake though. DAMN I love frosting.

[brunel-music-and-driving]

Our student, Leti Hosang, was delighted to be invited to present her project at the recent BASES Physical Activity for Health Division Day (online). Earlier in the year, her project won the BASES Undergraduate Dissertation of the Year Award.

Leti’s dissertation titled ‘Effects of Exercise on Electroencephalograpy-Recorded Neural Oscillations: A Systematic Review’ is published in International Review of Sport and Exercise Psychology on a gold open-access basis (see https://tandfonline.com/doi/full/10.1080/1750984X.2022.2103841).

Here is Leti in action, answering a question from a fellow delegate at the event!

[teachersource]

John Zachary Young was born on March 18, 1907. Generally known as "JZ" (really) or "JZY", he was an English zoologist and neurophysiologist, described as "one of the most influential biologists of the 20th century". Most of Young's scientific research was on the nervous system. Young is probably best remembered for his textbooks, The Life of Vertebrates and The Life of Mammals.

[priyeshxxvii]

10.07 🐭 Physiology revision ~ Basal Ganglia

Third consecutive day of 12 hours class! Going strong! 🔥😅🐐

[ellapsy-blog]

Introduction

Dans ce premier blog nous allons tout d’abord nous intéresser au différentes définitions que comporte le thème principale : l’humain.

Il y’a la catégorie des sciences humaines qui comporte plusieurs sous parties ou sous catégories peut importe,

les sciences criminelles et ses nombreuses matières scientifiques, et pour finir

le droit qui comporte plusieurs branches. (Tout ne sera pas étudier, j’ai choisi les catégories que j’aime et qui m’inspire le plus). Les sciences criminelles se joint au droit.

Les sciences humaines : Qu’est-ce que les sciences humaines ? Qu’est-ce qu’on entend par sciences humaines ?

C’est une discipline qui se concentre sur l’homme et ses comportements (individuels et collectifs) passés et présents. Ses disciplines sont :

- la psychologie

- la sociologie

- l'ethnologie

- l'anthropologie

- l'histoire

- l'économie

- la linguistique

Les domaines d’études sur lesquels je vais me concentrer sont la psychologie, la sociologie, (l’anthropologie 🤔), et sans doute un peu d’histoire.

Les sciences criminelles ou criminologie : Les sciences criminelles ont pour objet la prévention et/ou la répression du phénomène criminelle du point de vue de tous les protagonistes (infracteur, victime, société).

Pour plus de compréhension le terme crime provient du latin criminis qui signifie décision judiciaire. Ce pourquoi ça a un lien avec le droit.

On y trouve donc :

- criminologie

- psychiatrie criminelle

- psychologie criminelle

- médecine légale

- police technique et scientifique

La criminologie et la psychologie seront étudiés. Ainsi qu’un peu d’histoire, un peu culture ne fait pas de mal 😉

Le droit : c’est poser un cadre légal pour vivre en société.

Pour ce qui est du droit c’est extrêmement vaste et seulement 2 branches seront étudier : le droit pénal et le droit judiciaire, qui font partie de la famille du droit interne. (oui parce qu’il existe plusieurs famille en droit : le droit public qui s’oppose au droit privé et le droit interne qui s’oppose au droit international) Bref ! Je vous met le lien sur les autres branches pour la curiosité 🧐

Le droit pénal : fixe les comportements contraires à la loi – les « infractions » – et détermine les sanctions pénales qui leur sont applicables. Le droit pénal se distingue du droit civil : Le droit pénal concerne les rapports entre l'individu et la société dans son ensemble.

Le droit judiciaire : quant à lui régit l'organisation des tribunaux, la procédure civile et la preuve. Il régit la manière dont les personnes vont exercer leurs droits.

Évidemment, il est difficile de comprendre l’humain sans s’intéressait un minimum à son système nerveux. Alors pourquoi pas quelques petites infos sur les neurosciences et la neurophysiologie mais plus particulièrement à la neuropsychologie

Les neurosciences : c’est l’étude du système nerveux du point de sa structure.

A contrario la neurophysiologie : c’est l’étude des fonctions du système nerveux. (physio : fonctionnement, logie : étude).

La neuropsychologie : relation entre le cerveau et le fonctionnement psychologique (fonctions cognitives, comportements, émotions)

Et voilà pour cette intro 😊 au prochain blog on verra notre premier chapitre qui se portera sur la psychologie : son histoire, ses disciplines, son but…

[aria-86]

Begin final exams

🍀

[davidbrussat]

Providence lost, regained II

Postcard of Waterman Building (1893), RISD’s first permanent edifice. (RISD VR blog) The Rhode Island School of Design offered its services [a decade ago] to assist the I-195 commissioners in producing a successful design template for the 195 land. To shape its guidance, RISD should touch base with its origins. The school was formed in 1877 to soften and sweeten the local manufacturing process.…

[clairelcmartin]

Testing Times I’ve experienced some weird tests at King’s College Hospital but today’s was very strange. Last time I was in the Ruskin Wing, 21 years ago, I was legs akimbo giving birth with lots of trainees traipsing past, having a good butcher’s and declaring, “Dilating nicely.”  Today, I was in Neurophysiology, electrodes attached to my head and eyes, staring at a black and white chessboard focused on a single red square, holding breath and not allowed to blink while lights flashed.  There is a fair old set-up for such torturous exercises and while Naz was sticking gold probes in my eyes (I kid you not) Lydia was taking down the medical history.  When confronted with such questions, we Hong Kong adoptees usually ask, “Do you want the long version or the short one?”  Followers of my ramblings know that I have been whinging about my eyes recently: glaucoma, cataracts, the whole ageing nine yards.  It creeps up, it is ignored, I put up with odd socks and clashing colours choices to challenge even Vivienne Westwood, until the one that takes the proverbial biscuit.  Wait for it: I hailed an ambulance thinking it was a bus.  Lydia choked on her coffee. “Did it stop?” “Thankfully not.” “Wonder what the driver thought…” “That there was a bus behind?”  Please God. Allegedly our eyes did not develop properly in the orphanages.  Long Lost Family, Series 10, Episode 4: the long version…   #writing #book #booklover #creativewriting #RamblingOn #MindNinja #ChinWag #Cl-airBrush #memories #memoir #100daysofwriting #kingscollegehospital #neurophysiology https://www.instagram.com/p/Cpf4qMsL5Sx/?igshid=NGJjMDIxMWI=

[e94q01atid0x]

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[economicsresearch]

page 180 - is that a fish? Are those fishes?

I can hear a sound that can only be described as flopping about, but I can’t see anything.

Maybe there’s an underground river that is finally re-emerging, soon to fill the cell and drown all the creatures that live herein.

How many creatures live here, and do I count my surviving gut biome individually?

What does a bat taste like?