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Biological Phycology
test 2
45
Communication
Undergraduate 2
10/22/2013

Additional Communication Flashcards

 


 

Cards

Term
volley principle
Definition

states that the auditory nerve can have volleys of impulses up to 400 per second even though no individual axon approaches that frequency by itself this principle provides justification for the place theory

Term
Cells outside A1
Definition

respond to auditory objects and are most likely responsible for interpreting the meaning of sounds

 

Term
The vestibular sense
Definition

refers to the system that detect the position and the movement of the head

Term
A1
Definition

 

is the destination of information from the auditory system and is located in the superior temporal cortex which contains area MT that allows for the detection of the location of sound

 

 

 

Term
Damage to A1
Definition
does not necessarily cause deafness unless damage extends to the subcortical areas
Term
receptors
Definition

Information from  below the head enters the spinal cord and travel through the 31 spinal nerves to the brain

Term
Pain activates
Definition

the hypothalamus, amygdale and cingulated cortex which results in an emotional component to pain

Term

Mild pain

 

Definition

Mild pain triggers the release of glutamate while

Term
Damaged or inflamed tissue
Definition
releases histamine nerve growth factor and other chemicals that increase the number of sodium gates in nearby pain receptors which magnifies pain responses
Term
Plasticity of the brain
Definition

refers the idea that the brain is constantly changing throughout the lifetime

Term
Proliferation
Definition

refers to the production of new cells neurons in the brain primarily occurring early in life

Term
Differentiation
Definition

refers to the forming of the axon and dendrite that gives the neuron its distinctive shape

Term
perception of flavor
Definition

Our perception of flavor is the combination of both taste and smell these axons converge in the endopiriform cortex

 

Term

the nucleus of the tractus solitaries (NTS)

Definition

Taste nerves project to a structure in the medulla known as

Term
olfactory bulb
Definition

sends axons to the cerebral cortex where messages are coded by location

Term
Sensory receptors
Definition

transducer (convert) energy into electrochemical patterns

 

Term
sensory coding
Definition

The brain does not duplicate what we see ;

is determined by which neurons are active

Term
retina
Definition
is lined with visual receptors TRUE
Term
The optic nerve
Definition

consist of the axons of ganglion cells that band together and exit through the back of the eye and travel to the brain

Term
central portion of the macula
Definition

is the fovea and allows for acute and detailed vision.

Term
Rods
Definition

are most abundant in the periphery of the eye and respond to faint light;

Term
Hubel and Weasel
Definition
distinguished various types of cells in the visual cortex including simple cells, complex cells, end-stopped/ hypercomplex cells
Term
visual cortex
Definition

 cells are aligned together in columns cells within a given column process similar information responding either to the right left or both eyes equally

Term
Sensitive critical periods
Definition
are periods of time during the lifespan when experiences have a particularly strong and long lasting effect
Term
critical period begins
Definition

when gaba becomes widely available in the brain and

Term
Frequency theory
Definition

is defined by the basilar membrane vibrating in synchrony with sound and causing auditory nerve axons to produce action potentials at the same frequency.

Term
Place theory
Definition

describes that each area along the basilar membrane is tuned to a specific frequency of sound wave

Term
Photopigments
Definition

are chemicals contained by both rods and cones that release energy when struck by light.

Term
Rods and cones
Definition

of the retina make synaptic contact with bipolar cells and horizontal cells.

Term
Ganglion cells
Definition

of primates generally fall into three categories including parvocellular neurons, magnocellular neurons, and koniocellular neurons. ****TRUE

Term
Myelination
Definition

refers to process by which glia produce the fatty sheath that covers the axons of some neurons

Term
Chemical distortions
Definition

in the brain during early development can cause significant impairment and development problems ***TRUE

Term
axon in the peripheral nervous system
Definition

if crushed it follows its myelin sheath back to the target and grows back toward the periphery at a rate of about 1 mm per day

Term
Synaptogenesis
Definition

is the final stage of neural development and refers to the formation of the synapses between neurons and occurs throughout the life as neurons are constantly forming new connections and discarding old ones

Term
Exposure to alcohol
Definition

in the fetus brain suppresses glutamate and enhances the release of GABA

Term
Deafferenated limbs
Definition

are limbs that have lost their afferent sensory input

Term
Growing axons
Definition
reach their target area by following a gradient of chemicals in which they are attracted by some chemicals and repelled
Term
thickness of the cerebral cortex
Definition
declines in old age but much less in those that are physically active
Term
neurotrophin
Definition

is a chemical that promotes the survival and activity of neurons axons that are not exposed to neurotrophin after making connections undergo apoptosis

Term
Diaschisis
Definition
refers to the decreasing activity of surviving neurons after damage to other neurons
Term
Collateral sprouts
Definition

are new branches formed by other non damaged axon that attach to vacant receptors

Term
Gangliosides
Definition
a class of glycolipids formed by the combination of carbohydrate and fat molecules also promote the restoration of damaged brains
Term
stronger pain
Definition
triggers the release of glutamate and substance
Term
critical period ends
Definition
with the onset of chemicals that inhibit axonal sprouting.
Term
cones
Definition
are most abundant in the fovea and respond to color and bright light.
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