Basics in Physiology for BME (Lecture 3)

415060-HS2022-0 -Master Biomedical Engineering BME Uni Bern

415060-HS2022-0 -Master Biomedical Engineering BME Uni Bern


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Cartes-fiches 53
Langue English
Catégorie Médecine
Niveau Université
Crée / Actualisé 05.10.2022 / 27.05.2024
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Meissner corpuscle

Merkel
disk

Pacini corpuscle

Hair follicle
sensor

Merkel
disk

Ruffini
corpuscle

Str. corneum

Epidermis

Corium

Subcutis

Hair follicle
sensor

SA –slowly adapting
RA –rapidly adapting

Meissner corpuscle

Merkel disk

Ruffini corpuscle

Sensor potential (generator potential)

Somatosensation

(pressure)

Resting state

Membrane expansion by pressure

Nervus medianus

Meissner corpuscle

Pacini corpuscle

Grey matter

White matter

receptor

Spinal nerve

Size of receptive fields increases from distal to proximal

Lemniscal system

Anterolateral system

Primary somatosensory
cortex (areas1, 2, 3a, 3b)

Slowly
adapting

spinal cord

Brain stem

Somatosensory cortex

Schwann-cell

polymodal nociceptors

unimodal nociceptors

Aδ-fibres(~15 m/sec; 1.0-1.5 μm)
mediate the first pain

C-fibres(~1 m/sec; 0.3-0.5 μm)
mediate the second pain

Nociceptors possess a high activation threshold