Other scientists have connected the brains of rats and monkeys, and
transmitted brain signals from a human to a rat, using electrodes inserted into animals» brains.
The researchers hope that this proof - of - concept study could lead to smaller devices that wirelessly
transmit brain signals to wearable, muscle - stimulating garments.
The Duke researchers, working at the Center for Neuroengineering, have previously built BMIs to capture and
transmit the brain signals of individual rats, monkeys, and even human subjects to artificial devices.
Now, scientists have developed the first device to solve those problems, a masklike instrument that can
transmit brain signals even when the wearer is moving.
In a paper being published online today in the scientific journal Cell Stem Cell, Sheng Ding, PhD, reveals efficient and robust methods for transforming adult skin cells into neurons that are capable of
transmitting brain signals, marking one of the first documented experiments for transforming an adult human's skin cells into functioning brain cells.
Not exact matches
One theory is that this stimulation depletes the nerves of Substance P, a neuropeptide that
transmits pain
signals to the
brain, which then reduces pain and irritation in a treated area.
Analysis of their
brains revealed inflammation and decreased numbers of dendrites, which
transmit signals between nerves.
We perceive sound after vibrations in the inner ear are detected by «hair cells» and
transmitted to the
brain as electrical
signals.
The retina is the part of the eye that converts optical images into nerve
signals, which are then
transmitted to the
brain where vision is interpreted.
Dulac and her colleagues tracked
brain activity in the medial amygdala, an almond - shaped structure that
transmits smell
signals to the hypothalamus.
These thin, tubelike structures
transmit electrical and chemical
signals that are vital for carrying information among different regions of the
brain.
Studies of deafness often emphasize the role of hair cells, the sensory cells that
transmit sound
signals to the
brain.
Unfortunately, most of the loss is in gray matter, the critically important part of the
brain composed of neurons, the cells that
transmit the
signals that keep us breathing and thinking.
He is part of a growing movement of researchers struggling to perfect neural prostheses, devices that employ electrodes to receive
signals from and
transmit them to the
brain.
When exposed to capsaicin, these receptors open to allow in sodium and calcium ions, causing the receptors to
transmit that hot
signal to the
brain.
In the new study, the team focused on neurons called amacrine cells and horizontal cells, which have a known role in «preprocessing» — or adjusting — electrical
signals transmitted to the
brain from the photoreceptors after they have been stimulated by light photons.
DTI is a non-conventional MRI technique that allows detailed analysis of the white matter tracts that
transmit nervous
signals through the
brain and body.
Individual antennas in system
transmit, in sequence, a weak microwave
signals through the
brain, while the other receiving antennas measure the reflected
signals.
Scientists in the US are planning to map the
brain activity of the dragonfly as it hunts, using a specially built backpack to
transmit electrical
signals from the insect's active neurons to a computer.
The spinal cord
transmits pain
signals to the
brain, where they are consciously perceived.
Nerve cells in the
brain, or neurons, are known to communicate among themselves by
transmitting electrical
signals, aided by chemical
signaling at the synapses connecting the neurons.
The researchers also investigated how pheromone
signals are
transmitted through the olfactory circuit in the
brain.
Johns Hopkins researchers have developed a method to efficiently turn human stem cells into retinal ganglion cells, the type of nerve cells located within the retina that
transmit visual
signals from the eye to the
brain.
Retinas are built of a stack of different types of neurons, each connected by synapses that
transmit signals from photoreceptors to the
brain.
Working with an animal model, the researchers found that a type of cell present in the
brain's primary processing area during early development, long thought to form structural scaffolding with no role in
transmitting sensory information, may conduct such
signals after all.
Conventional wisdom suggested that mammalian
brains transmit their first sensory
signals in response to sound after the thalamus fully connects to the cerebral cortex.
In addition, the ability to
transmit electrical
signals involved in learning and memory — a sign of a healthy
brain — was impaired, even in mice that had been joined for just four months.
The second layer is made of bipolar cells that act as a conduit between the photoreceptor and the third type of cell, the ganglion, which
transmits the light
signals to the
brain.
For the new study, researchers from the University of Pittsburgh Medical Center (UPMC) in Pittsburgh used diffusion tensor imaging (DTI), an MRI technique that measures the integrity of white matter — the
brain's
signal -
transmitting nerve fibers — to see if injuries to the nerves may be the root cause of these post-traumatic depression and anxiety symptoms.
The retina contains three cellular layers that work together to detect and
transmit light
signals to the
brain (see diagram).
Shlizerman's collaborators, including Steven Reppert at the University of Massachusetts, recorded
signals from antennae nerves in monarchs as they
transmitted clock information to the
brain as well as light information from the eyes.
To find the new mutation, the scientists looked at five key genes that play a role in phototransduction, or the process by which light
signals are
transmitted through the eye to the
brain.
In the
brains of all vertebrates, information is
transmitted through synapses, a mechanism that allows an electric or chemical
signal to be passed from one
brain cell to another.
Here the U-shaped loop at the top shows the tract through which
signals from one side of the
brain are
transmitted to the other.
The researchers speculated that
brain cells might be particularly reliant on their mitochondria to power the production and recycling of the chemical
signals they use to
transmit information.
When a particular molecule happens to fall into a matching receptor, a neural
signal is triggered that is
transmitted to the
brain as an odor.
In the absence of that protein, other proteins involved in
transmitting signals between neurons in the
brain are overproduced, notably mGluR5, a receptor for the neurotransmitter glutamate.
Studies in animals indicated that in branches of the nerve that exit from the back of the
brain and wrap around various parts of the face and head, overactive cells would respond to typically benign lights, sounds and smells by releasing chemicals that
transmit pain
signals and cause migraine.
Across a range of disorders, deep -
brain stimulation works much the same way: A pacemaker - like device in the chest
transmits a
signal to the implanted electrode via wires that run underneath the scalp.
«Investigating the pleasure centers of the
brain: How reward
signals are
transmitted.»
They receive and process
signals from the retina's light - detecting cells, the rods and the cones, and
transmit them to another set of cells that, in turn, transfer the information to the
brain.
A well - known example of this is when the spinal cord continues to
transmit signals even when the
brain is no longer involved, as in the headless chicken running around the farmyard.
Dopamine is important for
transmitting messages between
brain cells, but over-active dopamine
signalling may cause parts of the
brain that are supposed to be separate to communicate with each other.
«Almost nothing is known» about the molecular and cellular mechanism by which water is detected in the mouth and throat, and the neural pathway by which that
signal is
transmitted to the
brain, says Zachary Knight, a neuroscientist at the University of California, San Francisco.
When these photoreceptors detect light, they send a
signal to specialized neurons in the retina called retinal ganglion cells, or RGCs, which then
transmit visual information to the
brain by firing electrical pulses along the optic nerve.
Our
brains are made up of billions and billions of nerve cells or neurons that gather and
transmit signals via so - called synapses.
Neurons, or nerve cells, in the
brain communicate with each other by
transmitting electric
signals, or firing action potentials, through long processes named axons (which send out
signals) and dendrites (which receive
signals).
A temporary bioelectronic device implanted on the lower spinal cord will
transmit electrical impulses, mimicking
brain signals, from below the spinal injury to the legs.
Two types of nerves
transmit signals between the body and the
brain: efferent nerves, which relay
signals from the
brain to the body, and afferent nerves, which send
signals from the body to the
brain.
They provide the energy needed for communication between
brain cells, which is crucial for
transmitting stimuli and
signals and thus for optimal functioning of the body.