[PDF][PDF] Motor unit

CJ Heckman, RM Enoka - Comprehensive physiology, 2012 - drive.google.com
Movement is accomplished by the controlled activation of motor unit populations. Our
understanding of motor unit physiology has been derived from experimental work on the …

Persistent inward currents in motoneuron dendrites: implications for motor output

CJ Heckman, MA Gorassini… - Muscle & Nerve: Official …, 2005 - Wiley Online Library
The dendrites of motoneurons are not, as once thought, passive conduits for synaptic inputs.
Instead they have voltage‐dependent channels that provide the capacity to generate a very …

Transformation of nonfunctional spinal circuits into functional states after the loss of brain input

G Courtine, Y Gerasimenko, R Van Den Brand… - Nature …, 2009 - nature.com
After complete spinal cord transections that removed all supraspinal inputs in adult rats,
combinations of serotonergic agonists and epidural electrical stimulation were able to …

Descending command systems for the initiation of locomotion in mammals

LM Jordan, J Liu, PB Hedlund, T Akay… - Brain research reviews, 2008 - Elsevier
Neurons in the brainstem implicated in the initiation of locomotion include glutamatergic,
noradrenergic (NA), dopaminergic (DA), and serotonergic (5-HT) neurons giving rise to …

Motoneuron excitability: the importance of neuromodulatory inputs

CJ Heckman, C Mottram, K Quinlan, R Theiss… - Clinical …, 2009 - Elsevier
The excitability of spinal motoneurons is both fundamental for motor behavior and essential
in diagnosis of neural disorders. There are two mechanisms for altering this excitability. The …

Intermittent hypoxia and neurorehabilitation

EJ Gonzalez-Rothi, KZ Lee, EA Dale… - Journal of applied …, 2015 - journals.physiology.org
In recent years, it has become clear that brief, repeated presentations of hypoxia [ie, acute
intermittent hypoxia (AIH)] can boost the efficacy of more traditional therapeutic strategies in …

Controlling specific locomotor behaviors through multidimensional monoaminergic modulation of spinal circuitries

P Musienko, R Van Den Brand… - Journal of …, 2011 - Soc Neuroscience
Descending monoaminergic inputs markedly influence spinal locomotor circuits, but the
functional relationships between specific receptors and the control of walking behavior …

Hyperexcitable dendrites in motoneurons and their neuromodulatory control during motor behavior

CJ Heckman, RH Lee, RM Brownstone - Trends in neurosciences, 2003 - cell.com
Dendrites contain voltage-sensitive conductances that, in vivo, can be influenced by
neuromodulatory inputs. In spinal motoneurons, dendrites have voltage-activated persistent …

[HTML][HTML] The role of the serotonergic system in locomotor recovery after spinal cord injury

M Ghosh, DD Pearse - Frontiers in neural circuits, 2015 - frontiersin.org
Serotonin (5-HT), a monoamine neurotransmitter synthesized in various populations of
brainstem neurons, plays an important role in modulating the activity of spinal networks …

Stimulation of the Parapyramidal Region of the Neonatal Rat Brain Stem Produces Locomotor-Like Activity Involving Spinal 5-HT7 and 5-HT2A Receptors

J Liu, LM Jordan - Journal of neurophysiology, 2005 - journals.physiology.org
Locomotion can be induced in rodents by direct application 5-hydroxytryptamine (5-HT) onto
the spinal cord. Previous studies suggest important roles for 5-HT7 and 5-HT2A receptors in …