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NEUROPHYSIOLOGY

Cutaneous Sensory Receplors

Melanoryte

Arrectot muscle ofliair, Sebaceous gland v __ Cuticle.

Interna! sheath.

txternal sheath,,

Meissner's corpusdc

.Porę of sweal gland

Stratum corncum Stratom / lucidum

.Stratom

granulosum

, Stratum spinosum

• Stratum

Connective tissuo layer >

■ Dermal papilla (of papiflary

layer)

■ Reliciriar

Han culide-

Sweat gtand.

Hair matrix-

Papilla ot hair tollicie •

Pacinian corpusdc'

Vein

Suhctitaneous .■mery and win

Lbstic fibers V Skin Rgaments (retinacula c utis)

Basal epitheiial cełls-

Motor

lautonomic)

Cutaneous

,Basomont membranę ,,Axon terminal Mitochondńon j/ Schwann celi

Cross section

Cytoplasmit

pmtrusion

. Merkel cdi

Mitochondria'

I nbulntcd nudeus

fxpanded axon terminal-

■ (iranulated

■ Schwann ccii

Schwann telk ■

Figurę 2.23 Skin and Cutaneous Receptors_

Cutaneous receplors respond to touch (mechanoreceptors), pain (nodceptors), and temperaturę (thermoreceptors). Several dłfferent t> l>es of receptors are present in skin. Mei$$ncr's corpuscies have smali receptive rlelds and respond hest to stimuli that are applied at Iow frequcncy (i.e., lluiter). The pacinian corpuscies are located in the suheutaneous tissue and have large rcceptive fields. Tlicy respond best to higlvfrequency slimulation (i.e., vibration). Merkel's dises have smali recoptivc fields and respond to touch and pressure (i.e., indenting the skini. Ruffinfs corpuscies have large receptive fields, and they also respond to touch and pressure. Free nerve end-ings respond to pain and temperaturę.

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