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Cerebral Dynamics during the Observation of PLD Depicting Postural Adjustments

url: https://portal.numec.prp.usp.br/experiments/cerebral-dynamics-during-the-observation-of-pld-depicting-postural-adjustments/  
Cerebral Dynamics during the Observation of Point-Light Displays Depicting Postural Adjustments. Design: We registered the EEG activity of 12 volunteers while they passively watched point light displays (PLD) depicting quiet stable (QB) and an unstable (UB) postural situations and their respective scrambled controls (QS and US). In a pretest, 13 volunteers evaluated the level of stability of our two biological stimuli through a stability scale.
 
From study: Cerebral Dynamics during the Observation of PLD Depicting Postural Adjustments


Volunteers
12 participants

A total of 25 healthy male subjects were evaluated. Thirteen volunteers (age range 19–38 years) participated in the preliminary evaluation of the point-light videos built for this study, and 12 volunteers (age range 20–39 years) were subjected to the EEG data collection. All the subjects had normal or corrected vision, and did not report any neurological, orthopedic or muscular pathology; the volunteers were classified as right-handed, according to the Edinburgh lateral dominance scale (Oldfield, 1971). The volunteers signed an informed consent, after comprehensive information detailing the nature of the study and the protocol to be performed had been given to them. The local ethical research committee approved the present experimental protocol (process number 13481213.4.0000.5257).


Textual description
Main step: Set of steps
	-Identification: Procedimento único
	-Type: Sequence
	-Sub-steps: (1, 2, 3)
Step 1: Task for experimenter
	-Identification: Preparar voluntário para o experimento
	-Description: Posicionamento do monitor e cadeira; instalação do equipamento de EEG; colocação da touca no voluntário; calibração e verificação do equipamento de EEG; preparação do software de apresentação do estímulo;
	-Number of repetitions: 1
	-Order: 1
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 2: Instruction
	-Identification: Instrução do voluntário
	-Description: Explicação dos procedimentos.
	-Text: (texto da instrução)
	-Number of repetitions: 1
	-Order: 2
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3: Set of steps
	-Identification: Sessão do voluntário
	-Type: Parallel
	-Number of repetitions: 1
	-Order: 3
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
	-Sub-steps: (3.1, 3.2)
Step 3.1: EEG
	-Identification: Coleta de EEG
	-Number of repetitions: 1
	-Order: 1
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2: Set of steps
	-Identification: Apresentação dos estímulos
	-Description: Apresentação de 256 repetições dos estímulos básicos, agrupados em 8 blocos de 32 rodadas
	-Type: Sequence
	-Number of repetitions: Unlimited
	-Order: 2
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
	-Sub-steps: (3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6, 3.2.7, 3.2.8, 3.2.9, 3.2.10, 3.2.11, 3.2.12, 3.2.13, 3.2.14, 3.2.15)
Step 3.2.1: Set of steps
	-Identification: Bloco de estímulos
	-Description: Sequência de 32 rodadas, com 8 rodadas de cada tipo, embaralhadas
	-Type: Sequence
	-Name of use: Bloco 1
	-Number of repetitions: 1
	-Order: 8
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
	-Sub-steps: (3.2.1.1)
Step 3.2.1.1: Stimulus
	-Identification: Estímulos de um bloco
	-Description: Uma rodada de estímulo consistindo de uma fase de fixação (3 segundos) e uma fase de estímulo propriamente dito (3 segundos).
Um estímulos pode ser do tipo HB, HS, QB ou QS.
	-Duration value: 6
	-Duration unit: s
	-Stimulus type: Visual
	-Number of repetitions: 32
	-Order: 1
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.2: Pause
	-Identification: Pausa entre blocos
	-Duration value: 3
	-Duration unit: s
	-Number of repetitions: 1
	-Order: 9
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.3: Set of steps
	-Identification: Bloco de estímulos
	-Description: Sequência de 32 rodadas, com 8 rodadas de cada tipo, embaralhadas
	-Type: Sequence
	-Name of use: Bloco 2
	-Number of repetitions: 1
	-Order: 10
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
	-Sub-steps: (3.2.3.1)
Step 3.2.3.1: Stimulus
	-Identification: Estímulos de um bloco
	-Description: Uma rodada de estímulo consistindo de uma fase de fixação (3 segundos) e uma fase de estímulo propriamente dito (3 segundos).
Um estímulos pode ser do tipo HB, HS, QB ou QS.
	-Duration value: 6
	-Duration unit: s
	-Stimulus type: Visual
	-Number of repetitions: 32
	-Order: 1
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.4: Pause
	-Identification: Pausa entre blocos
	-Duration value: 3
	-Duration unit: s
	-Number of repetitions: 1
	-Order: 11
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.5: Set of steps
	-Identification: Bloco de estímulos
	-Description: Sequência de 32 rodadas, com 8 rodadas de cada tipo, embaralhadas
	-Type: Sequence
	-Name of use: Bloco 3
	-Number of repetitions: 1
	-Order: 12
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
	-Sub-steps: (3.2.5.1)
Step 3.2.5.1: Stimulus
	-Identification: Estímulos de um bloco
	-Description: Uma rodada de estímulo consistindo de uma fase de fixação (3 segundos) e uma fase de estímulo propriamente dito (3 segundos).
Um estímulos pode ser do tipo HB, HS, QB ou QS.
	-Duration value: 6
	-Duration unit: s
	-Stimulus type: Visual
	-Number of repetitions: 32
	-Order: 1
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.6: Pause
	-Identification: Pausa entre blocos
	-Duration value: 3
	-Duration unit: s
	-Number of repetitions: 1
	-Order: 13
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.7: Set of steps
	-Identification: Bloco de estímulos
	-Description: Sequência de 32 rodadas, com 8 rodadas de cada tipo, embaralhadas
	-Type: Sequence
	-Name of use: Bloco 4
	-Number of repetitions: 1
	-Order: 14
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
	-Sub-steps: (3.2.7.1)
Step 3.2.7.1: Stimulus
	-Identification: Estímulos de um bloco
	-Description: Uma rodada de estímulo consistindo de uma fase de fixação (3 segundos) e uma fase de estímulo propriamente dito (3 segundos).
Um estímulos pode ser do tipo HB, HS, QB ou QS.
	-Duration value: 6
	-Duration unit: s
	-Stimulus type: Visual
	-Number of repetitions: 32
	-Order: 1
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.8: Pause
	-Identification: Pausa entre blocos
	-Duration value: 3
	-Duration unit: s
	-Number of repetitions: 1
	-Order: 15
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.9: Set of steps
	-Identification: Bloco de estímulos
	-Description: Sequência de 32 rodadas, com 8 rodadas de cada tipo, embaralhadas
	-Type: Sequence
	-Name of use: Bloco 5
	-Number of repetitions: 1
	-Order: 16
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
	-Sub-steps: (3.2.9.1)
Step 3.2.9.1: Stimulus
	-Identification: Estímulos de um bloco
	-Description: Uma rodada de estímulo consistindo de uma fase de fixação (3 segundos) e uma fase de estímulo propriamente dito (3 segundos).
Um estímulos pode ser do tipo HB, HS, QB ou QS.
	-Duration value: 6
	-Duration unit: s
	-Stimulus type: Visual
	-Number of repetitions: 32
	-Order: 1
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.10: Pause
	-Identification: Pausa entre blocos
	-Duration value: 3
	-Duration unit: s
	-Number of repetitions: 1
	-Order: 17
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.11: Set of steps
	-Identification: Bloco de estímulos
	-Description: Sequência de 32 rodadas, com 8 rodadas de cada tipo, embaralhadas
	-Type: Sequence
	-Name of use: Bloco 6
	-Number of repetitions: 1
	-Order: 18
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
	-Sub-steps: (3.2.11.1)
Step 3.2.11.1: Stimulus
	-Identification: Estímulos de um bloco
	-Description: Uma rodada de estímulo consistindo de uma fase de fixação (3 segundos) e uma fase de estímulo propriamente dito (3 segundos).
Um estímulos pode ser do tipo HB, HS, QB ou QS.
	-Duration value: 6
	-Duration unit: s
	-Stimulus type: Visual
	-Number of repetitions: 32
	-Order: 1
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.12: Pause
	-Identification: Pausa entre blocos
	-Duration value: 3
	-Duration unit: s
	-Number of repetitions: 1
	-Order: 19
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.13: Set of steps
	-Identification: Bloco de estímulos
	-Description: Sequência de 32 rodadas, com 8 rodadas de cada tipo, embaralhadas
	-Type: Sequence
	-Name of use: Bloco 7
	-Number of repetitions: 1
	-Order: 20
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
	-Sub-steps: (3.2.13.1)
Step 3.2.13.1: Stimulus
	-Identification: Estímulos de um bloco
	-Description: Uma rodada de estímulo consistindo de uma fase de fixação (3 segundos) e uma fase de estímulo propriamente dito (3 segundos).
Um estímulos pode ser do tipo HB, HS, QB ou QS.
	-Duration value: 6
	-Duration unit: s
	-Stimulus type: Visual
	-Number of repetitions: 32
	-Order: 1
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.14: Pause
	-Identification: Pausa entre blocos
	-Duration value: 3
	-Duration unit: s
	-Number of repetitions: 1
	-Order: 21
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
Step 3.2.15: Set of steps
	-Identification: Bloco de estímulos
	-Description: Sequência de 32 rodadas, com 8 rodadas de cada tipo, embaralhadas
	-Type: Sequence
	-Name of use: Bloco 8
	-Number of repetitions: 1
	-Order: 22
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
	-Sub-steps: (3.2.15.1)
Step 3.2.15.1: Stimulus
	-Identification: Estímulos de um bloco
	-Description: Uma rodada de estímulo consistindo de uma fase de fixação (3 segundos) e uma fase de estímulo propriamente dito (3 segundos).
Um estímulos pode ser do tipo HB, HS, QB ou QS.
	-Duration value: 6
	-Duration unit: s
	-Stimulus type: Visual
	-Number of repetitions: 32
	-Order: 1
	-Position in the set of steps : Fixed
	-Requires start and end datetime: No
EEG Settings
EEG setting for PLD experiment
EEG setting for PLD experiment

Amplifier: Net Amps 300 amplifier
The Net Amps 300 series of amplifiers powers the new Geodesic EEG system (GES) 300 series products. serial number: 123412341234
gain: 20.0
gain setting: 20.0
sampling rate: 500.0
number of used channels: 129

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