So funktioniert der Pupillenreflex (zum WIRKLICH verstehen)

Neurologie mit Dr. Janis July 2, 2025
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Neurologie mit Dr. Janis

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Wie funktioniert unser Gehirn? Wie ist es aufgebaut? Hier gibt‘s Erklärungen zu Neuroanatomie, Neurologie, Lern-Strategien und mehr. Wissenschaftlich fundiert, verständlich und hoffentlich unterhaltsam. Disclaimer: Die Inhalte auf diesem Kanal sind ausdrücklich keine Gesundheitsberatung. Bei persönlichen medizinischen Fragen wendet euch bitte an entsprechend qualifizierte Fachärzte. Impressum: Angaben gemäß § 5 TMG: Dr. med. Janis Hülsemann
 c/o Trafo Hub GmbH Sophienstr. 40 38118 Braunschweig Redaktionelle Verantwortung: Dr. med. Janis Hülsemann Umsatzsteueridentifikationsnummer: DE352861702 Telefon: +49 152 52986662 E-Mail: [email protected] (HINWEIS: Ich schaffe es leider zeitlich kaum noch auf persönliche E-Mails zu antworten, bitte nicht enttäuscht sein.) Berufsbezeichnung: Arzt
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Wenn helles Licht ins Auge fällt, wird die Pupille im Bruchteil einer Sekunde enger. Verrückt dabei: selbst wenn nur ein Auge beleuchtet wird, ziehen sich trotzdem die Pupillen beider Augen zusammen - gleichzeitig. Das gelingt durch eine Verschaltung von Nervenzellen in vier Schritten. Darum geht's in diesem Video, detailliert und trotzdem gut verständlich. Das geht auch ohne die speziellen Fachbegriffe - aber wer sie sich tatsächlich merken will, fürs Medizinstudium, Biologie lernen, und Co - hier sind die Namen der vier entscheidenden neuronalen Strukturen im Überblick: 1. ipRGC (intrinsisch photosensitive retinale Ganglienzellen); 2. Area pretectalis; 3. Nucleus accessorius nervi oculomotorii; 4. Ganglion ciliare und dann zum M. sphincter pupillae. Video-Abschnitte: 00:00 Intro Pupillenreflex 00:27 Zwei Pupillenmuskeln 02:47 Afferent 04:12 Im Hirnstamm 07:05 Efferent 08:23 Sympathikus 08:37 Einfluss von Emotionen 09:20 Zusammenfassung 10:36 Klinisches Beispiel Inhaltliche Quellen: - Trepel: Neuroanatomie: Struktur und Funktion, 8. Auflage, 2021 - Pape, Kurtz, Silbernagl: Physiologie, 10. Auflage, 2023 - Kandel: Principles of Neural Science, 6. Auflage, 2021 Bildquellen: sind im Abspann am Ende des Videos angegeben Disclaimer: Die Inhalte dieses Videos sind keine medizinische Beratung in irgendeiner Form. Es dient nicht zur Selbstdiagnose oder Selbstmedikation. Bei medizinischen Fragen wendet euch bitte an euren persönlichen Arzt oder Ärztin des Vertrauens. Alles wurde gründlich recherchiert, aber das Gehirn ist kompliziert und für Fehlerfreiheit kann ich natürlich nicht garantieren. Schreibt mir Verbesserungshinweise gerne in die Kommentare. Danke fürs Gucken und viel Spaß beim weiteren Lernen über unser Gehirn!

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