Mod 9.2 Flashcards by Oisin Tyrrell

Q

Cornea

A

Focusing

70-80% Refraction

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Q

Iris and Pupil

A

Pupil changes size to control light in

5:1

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Q

Lens

A

Changes shape ( Accommodation ) via Cillary Muscles

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Q

What is cillary muscles function

A

Lens Accomidation

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Q

Retina

A

Rear wall

Cones and Rods

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Q

Cones

A

Central

Colour

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Q

Rods

A

Outside

Dark Lighting

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Q

Short sight other name

A

Myopia

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Q

What lenses used for Short sight

A

Concave

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Q

Long sight other name

A

Hypermetropia

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Q

What lens used for Long sight

A

Convex

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Q

Outer Ear

A

Funnels sound to Ear Drum

Ear Drum vibrates

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Q

Middle Ear

A

Ossicles transmit Vibrations from EarDrum

Acoustic + Aural Reflex ( 80db 15 mins )

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Q

Inner Ear

A

Fluid

Cochlea gets vibrations from Ossciles

Vibrations changed to Neural

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Q

Ear hears frequency’s from

A

20 Hz to 20,000 Hz

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Q

Ear vulnerable to frequencys of

A

1000-4000 Hz

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Q

Selective Attention

A

Several inputs

Focus on one more than others

Q

Divided Attention

A

One or more input at same time

Q

Focused Attention

A

Single input

Q

Sustained Attention

A

Single input for long time

Q

Perception

A

Data to Info

Q

Confirmation Bias

A

Seeing what you want to see

Data lost without being precieved

Q

Registration or Encoding

A

Input to Memory

Q

Storage

A

Retention of Info in Memory

Retrieval

Recovering Info from Memory

What is Sensory Memory

Ultra Short Term Memory

How long is Ultra Short Term Memory info stored

2 seconds

Short term Memory

5-9 pieces For 10-20 seconds Chunks, Rehearsal

Long Term Memory

Unlimited Semantic = Basic Info Episodic = Experiences

Motor Programs

Memory of skills used without thought EG : Driving

Situation Awareness

Perception Comprehension Projection

NIHL definition

Noise Induced Hearing Loss

What influences NIHL

Intensity and Duration

At what Db level must hearing protection be worn

115 db for any length of time

What is Noise Dose

Combination of Duration and Intensity Any sound over 80 dB Measured as TWA

What does TWA stand for

Time Weighted Average

Recommend Max TWA

90 dB

What is Presbycusis

Hearing deteriorating in ages of over 30

Two types of Sensory Memory

Echoic and Ionic

Echoic

Ultra Short Term Memory Hearing 2-8 seconds

Ionic

Ultra Short Term Memory Visual 0.5 - 1 second