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| - Electroencephalography (EEG) is the recording of electrical activity along the scalp. EEG measures voltage fluctuations resulting from ionic current flows within the neurons of the brain. When Captain Samantha Carter was a host to Jolinar of Malkshur, the EEG picked up two separate brain wave patterns. (SG1: "In the Line of Duty")
- In 2153, an EEG was performed as part of the collection of biometric data about a Borg drone by using electrode pads. The data was submitted to a computer monitor. (ENT: "Regeneration") In 2365, a biobed performed an EEG scan on Commander William T. Riker. (TNG: "Shades of Gray" ) In 2367, Nurse Ogawa monitored Riker's EEG while he was having the Trill symbiont Odan transplanted into his body. (TNG: "The Host" )
- An electroencephalograph, or EEG for short, is a medical device designed to measure electrical activity of the brain. Usually, this can only be done indirectly, but measuring the electrical resistance of the skin above the skull. However, even this measurement can reveal a great deal about brain activity and whether it is normal compared to other patients. It is commonly used to diagnose neurological diseases, such as epilepsy, and can be used overnight to diagnose sleep disorders. The lack of EEG activity, or "brain death" is the standard definition of death for legal and medical purposes.
- Just as the activity in a computer can be understood on multiple levels, from the activity of individual transistors to the function of applications, so can the electrical activity of the brain be described on relatively small to relatively large scales. At one end are action potentials in a single axon or currents within a single dendrite of a single neuron, and at the other end is the activity measured by the EEG which aggregates the electric voltage fields from millions of neurons. So-called scalp EEG is collected from tens to hundreds of electrodes positioned on different locations at the surface of the head. EEG signals (in the range of milli-volts) are amplified and digitalized for later processing. The data measured by the scalp EEG are used for clinical and research purposes. In ne
- Electroencephalography (EEG) is the recording of electrical activity along the scalp produced by the firing of neurons within the brain. In clinical contexts, EEG refers to the recording of the brain's spontaneous electrical activity over a short period of time, usually 20–40 minutes, as recorded from multiple electrodes placed on the scalp. In neurology, the main diagnostic application of EEG is in the case of epilepsy, as epileptic activity can create clear abnormalities on a standard EEG study. A secondary clinical use of EEG is in the diagnosis of coma, encephalopathies, and brain death. EEG used to be a first-line method for the diagnosis of tumors, stroke and other focal brain disorders, but this use has decreased with the advent of anatomical imaging techniques such as MRI and CT. T
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| abstract
| - Just as the activity in a computer can be understood on multiple levels, from the activity of individual transistors to the function of applications, so can the electrical activity of the brain be described on relatively small to relatively large scales. At one end are action potentials in a single axon or currents within a single dendrite of a single neuron, and at the other end is the activity measured by the EEG which aggregates the electric voltage fields from millions of neurons. So-called scalp EEG is collected from tens to hundreds of electrodes positioned on different locations at the surface of the head. EEG signals (in the range of milli-volts) are amplified and digitalized for later processing. The data measured by the scalp EEG are used for clinical and research purposes. In neurology, the main diagnostic application of EEG is for epilepsy but this technique is also used to investigate many other pathologies such as sleep-related disorders, sensory deficits, brain tumors, etc. In cognitive neuroscience, EEG is used to investigate the neural correlates of mental activity from low-level perceptual and motor processes to higher-order cognition (attention, memory, reading, etc). In some cases, such as epileptic studies, when deeper brain activity needs to be recorded with more accuracy than provided by scalp EEG, clinicians use an invasive form of EEG known as intracranial EEG (icEEG) where electrodes are placed directly inside the skull. In some cases, a grid of electrodes is laid on the external surface of the brain, on dura mater yielding epidural EEG but in other cases, brain activity is recorded using deeper electrodes known as subdural EEG (sdEEG) and electrocorticography (ECoG). Because of the filtering characteristics of the skull and scalp, icEEG activity has a much higher spatial resolution than surface EEG. The technique is sometimes also referred to as stereotactic EEG (stereo-EEG or sEEG) to emphasize that it records from precise 3D locations defined by stereotaxy. However, since icEEG uses macro-electrodes for recording it can not detect single-neuron activity as it is feasible with neural implants based on micro-electrodes.
- Electroencephalography (EEG) is the recording of electrical activity along the scalp. EEG measures voltage fluctuations resulting from ionic current flows within the neurons of the brain. When Captain Samantha Carter was a host to Jolinar of Malkshur, the EEG picked up two separate brain wave patterns. (SG1: "In the Line of Duty")
- In 2153, an EEG was performed as part of the collection of biometric data about a Borg drone by using electrode pads. The data was submitted to a computer monitor. (ENT: "Regeneration") In 2365, a biobed performed an EEG scan on Commander William T. Riker. (TNG: "Shades of Gray" ) In 2367, Nurse Ogawa monitored Riker's EEG while he was having the Trill symbiont Odan transplanted into his body. (TNG: "The Host" )
- An electroencephalograph, or EEG for short, is a medical device designed to measure electrical activity of the brain. Usually, this can only be done indirectly, but measuring the electrical resistance of the skin above the skull. However, even this measurement can reveal a great deal about brain activity and whether it is normal compared to other patients. It is commonly used to diagnose neurological diseases, such as epilepsy, and can be used overnight to diagnose sleep disorders. The lack of EEG activity, or "brain death" is the standard definition of death for legal and medical purposes.
- Electroencephalography (EEG) is the recording of electrical activity along the scalp produced by the firing of neurons within the brain. In clinical contexts, EEG refers to the recording of the brain's spontaneous electrical activity over a short period of time, usually 20–40 minutes, as recorded from multiple electrodes placed on the scalp. In neurology, the main diagnostic application of EEG is in the case of epilepsy, as epileptic activity can create clear abnormalities on a standard EEG study. A secondary clinical use of EEG is in the diagnosis of coma, encephalopathies, and brain death. EEG used to be a first-line method for the diagnosis of tumors, stroke and other focal brain disorders, but this use has decreased with the advent of anatomical imaging techniques such as MRI and CT. Therefore, making waffles much better than pancakes!
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