[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 …

Synaptic control of motoneuronal excitability

JC Rekling, GD Funk, DA Bayliss… - Physiological …, 2000 - journals.physiology.org
Movement, the fundamental component of behavior and the principal extrinsic action of the
brain, is produced when skeletal muscles contract and relax in response to patterns of action …

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 …

The role of serotonin in reflex modulation and locomotor rhythm production in the mammalian spinal cord

BJ Schmidt, LM Jordan - Brain research bulletin, 2000 - Elsevier
Over the past 40 years, much has been learned about the role of serotonin in spinal cord
reflex modulation and locomotor pattern generation. This review presents an historical …

Subthalamic nucleus neurons switch from single-spike activity to burst-firing mode

C Beurrier, P Congar, B Bioulac… - Journal of …, 1999 - Soc Neuroscience
The modification of the discharge pattern of subthalamic nucleus (STN) neurons from single-
spike activity to mixed burst-firing mode is one of the characteristics of parkinsonism in rat …

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 …

Bistability in spinal motoneurons in vivo: systematic variations in persistent inward currents

RH Lee, CJ Heckman - Journal of neurophysiology, 1998 - journals.physiology.org
Lee, RH and CJ Heckman. Bistability in spinal motoneurons in vivo: systematic variations in
persistent inward currents. J. Neurophysiol. 80: 583–593, 1998. Bistable behavior in spinal …

Adjustable amplification of synaptic input in the dendrites of spinal motoneurons in vivo

RH Lee, CJ Heckman - Journal of Neuroscience, 2000 - Soc Neuroscience
The impact of neuromodulators on active dendritic conductances was investigated by the
use of intracellular recording techniques in spinal motoneurons in the adult cat. The well …

Persistent sodium and calcium currents cause plateau potentials in motoneurons of chronic spinal rats

Y Li, DJ Bennett - Journal of neurophysiology, 2003 - journals.physiology.org
After chronic spinal cord injury motoneurons exhibit large plateau potentials (sustained
depolarizations triggered by brief inputs) that play a primary role in the development of …

Input-output functions of mammalian motoneurons

RK Powers, MD Binder - Reviews of physiology, biochemistry and …, 2007 - Springer
Communication between neurons can occur chemically via synaptic transmission. This
communication process begins when an invading depolarization opens voltage-gated …