Analizatorul acustic Flashcards

1
Q

Segmentul receptor

A
  • se afla in urechea interna (in melcul membranos, pe membrana bazilara)
  • este reprezentat de organul Corti
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2
Q

Organul Corti

A
  • celule receptoare

- celule de sustinere: produc membrana reticulata

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3
Q

Celule receptoare

A
  • sunt dispuse:-medial intr-un singur strat
    - lateral in 3-4 straturi
  • la polul apical prezinta cili ce patrund in membrana reticulata, deasupra carei se afla membrana tectoria
  • la polul bazal prezinta terminatii nervoase (dendrite ale neuronilor senzitivi din ganglionul Corti)
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4
Q

Primul neuron

A

ganglionul Corti

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5
Q

Al doilea neuron

A

in trunchiul cerebral -> puntea lui Varolio -> nucleii cohleari

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6
Q

Al treilea neuron

A

in trunchiul cerebral -> mezencefal

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7
Q

Al patrulea neuron

A

in diencefal -> metatalamus ->corpii geniculati mediali

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8
Q

Segmentul central

A

aria auditiva se afla in lobul temporal -> girusul temporal superior

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9
Q

Sunetele se caracterizeaza prin:

A

inaltime data de frecventa, intensitate data de amplitudine, si timbru

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10
Q

Fiziologie

A

stimulii (vibratii ale aerului) -> pavilion -> conduct auditiv extern -> timpan -> lantul celor 3 oscioare -> fereastra ovala -> perilimfa din jurul melcului membranos -> organul Corti –influx nervos–> segmentul de conducere -> segmentul central -> senzatie de auz

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11
Q

Sunetele inalte si suntele joase

A

sunt percepute la baza melcului si respectiv varful melcului

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