Pyramidal Tracts - Physiology
Research News and Information

Sunday, November 22, 2009

Coding of visual space during motor preparation: Approaching objects rapidly modulate corticospinal excitability in hand-centered coordinates.

21 Sep 2009 Defensive behaviors, such as withdrawing your hand to avoid potentially harmful approaching objects, rely on rapid sensorimotor transformations between visual and motor coordinates. We examined the reference frame for coding visual information about ... Read more...

Voluntary motor output is altered by spike-timing-dependent changes in the human corticospinal pathway.

14 Sep 2009 Repeated pairs of timed presynaptic and postsynaptic potentials cause lasting changes in efficacy of transmission at many synapses. The corticospinal tract is the major pathway controlling voluntary movement in humans, and corticospinal neurons have ... Read more...

Activation of the opioidergic descending pain control system underlies placebo analgesia.

25 Aug 2009 Placebo analgesia involves the endogenous opioid system, as administration of the opioid antagonist naloxone decreases placebo analgesia. To investigate the opioidergic mechanisms that underlie placebo analgesia, we combined naloxone administration ... Read more...

Latest indexed articles for 'Pyramidal Tracts - Physiology'

These are the very latest articles for this heading:

• Coding of visual space during motor preparation: Approaching objects rapidly modulate corticospinal excitability in hand-centered coordinates. 21 Sep 2009
• Voluntary motor output is altered by spike-timing-dependent changes in the human corticospinal pathway. 14 Sep 2009
• Activation of the opioidergic descending pain control system underlies placebo analgesia. 25 Aug 2009
• The involvement of the motor cortex in postural control: a delicate balancing act. 30 Jul 2009
• TNF-alpha contributes to axonal sprouting and functional recovery following traumatic brain injury. 14 Jul 2009
• Enhanced excitability of the corticospinal pathway of the ankle extensor and flexor muscles during standing in humans. 13 Jul 2009
• Heritability of intracortical inhibition and facilitation. 13 Jul 2009
• Reassessment of corticospinal tract regeneration in Nogo-deficient mice. 6 Jul 2009
• Corticospinal output and loss of force during motor fatigue. 30 Jun 2009
• Prenatal growth and early postnatal influences on adult motor cortical excitability. 29 Jun 2009
• Motor threshold in transcranial magnetic stimulation: the impact of white matter fiber orientation and skull-to-cortex distance. 29 Jun 2009
• Facilitation of corticospinal excitability in the tibialis anterior muscle during robot-assisted passive stepping in humans. 9 Jun 2009
• Synaptic linkages between corticomotoneuronal cells affecting forelimb muscles in behaving primates. 8 Jun 2009
• Influence of touching an object on corticospinal excitability during motor imagery. 5 Jun 2009
• Activity of pyramidal tract neurons in the cat during standing and walking on an inclined plane. 31 May 2009
• Selective increase in corticospinal excitability in the context of tactile exploration. 30 May 2009
• Vibration prolongs the cortical silent period in an antagonistic muscle. 30 May 2009
• Coherence between motor cortical activity and peripheral discontinuities during slow finger movements. 25 May 2009
• A motor cortical contribution to the anticipatory postural adjustments that precede reaching in the cat. 18 May 2009
• Combining observation and imagery of an action enhances human corticospinal excitability. 18 May 2009

See a longer list of these articles.

Technical information about 'Pyramidal Tracts'

Definition: Fibers that arise from cells within the cerebral cortex, pass through the medullary pyramid, and descend in the spinal cord. Many authorities say the pyramidal tracts include both the corticospinal and corticobulbar tracts.

Descriptor UI: D011712

Alternative terms: Pyramidal Tracts; Pyramidal Tract; Tract, Pyramidal; Tracts, Pyramidal; Decussation, Pyramidal; Pyramidal Decussation; Corticobulbar Tracts; Corticobulbar Tract; Tract, Corticobulbar; Tracts, Corticobulbar; Corticospinal Tracts; Corticospinal Tract; Tract, Corticospinal; Tracts, Corticospinal;

Allowable Qualifiers: abnormalities; anatomy & histology; blood supply; cytology; drug effects; embryology; enzymology; growth & development; immunology; injuries; metabolism; microbiology; parasitology; pathology; physiology; physiopathology; radiation effects; radiography; radionuclide imaging; secretion; surgery; ultrastructure; ultrasonography; chemistry; virology;

Tree Number: A08.186.854.633; A08.612.380.730;