scholarly journals Changes in descending motor pathway connectivity after corticospinal tract lesion in macaque monkey

Brain ◽  
2012 ◽  
Vol 135 (7) ◽  
pp. 2277-2289 ◽  
Author(s):  
B. Zaaimi ◽  
S. A. Edgley ◽  
D. S. Soteropoulos ◽  
S. N. Baker
Keyword(s):  
Corticospinal Tract ◽  
Macaque Monkey ◽  
Motor Pathway

Increased expression of the growth-associated protein 43 gene in the sensorimotor cortex of the macaque monkey after lesioning the lateral corticospinal tract

2009 ◽  
Vol 516 (6) ◽  
pp. 493-506 ◽  
Author(s):  
Noriyuki Higo ◽  
Yukio Nishimura ◽  
Yumi Murata ◽  
Takao Oishi ◽  
Kimika Yoshino-Saito ◽  
...  
Keyword(s):  
Sensorimotor Cortex ◽  
Corticospinal Tract ◽  
Macaque Monkey

Motor command for precision grip in the macaque monkey can be mediated by spinal interneurons

2011 ◽  
Vol 106 (1) ◽  
pp. 122-126 ◽  
Author(s):  
B. Alstermark ◽  
L. G. Pettersson ◽  
Y. Nishimura ◽  
K. Yoshino-Saito ◽  
F. Tsuboi ◽  
...  
Keyword(s):  
Motor Control ◽  
Sweet Potato ◽  
Corticospinal Tract ◽  
Index Finger ◽  
Precision Grip ◽  
Motor Command ◽  
Macaque Monkey ◽  
General View ◽  
Macaque Monkeys ◽  
Spinal Interneurons

In motor control, the general view is still that spinal interneurons mainly contribute to reflexes and automatic movements. The question raised here is whether spinal interneurons can mediate the cortical command for independent finger movements, like a precision grip between the thumb and index finger in the macaque monkey, or if this function depends exclusively on a direct corticomotoneuronal pathway. This study is a followup of a previous report (Sasaki et al. J Neurophysiol 92: 3142–3147, 2004) in which we trained macaque monkeys to pick a small piece of sweet potato from a cylinder by a precision grip between the index finger and thumb. We have now isolated one spinal interneuronal system, the C3-C4 propriospinal interneurons with projection to hand and arm motoneurons. In the previous study, the lateral corticospinal tract (CST) was interrupted in C4/C5 (input intact to the C3-C4 propriospinal interneurons), and in this study, the CST was interrupted in C2 (input abolished). The precision grip could be performed within the first 15 days after a CST lesion in C4/C5 but not in C2. We conclude that C3–C4 propriospinal interneurons also can carry the command for precision grip.

scholarly journals Teaching NeuroImages: All hemiparesis are not contralateral

Neurology ◽  
2020 ◽  
pp. 10.1212/WNL.0000000000010755
Author(s):  
Y. Muralidhar Reddy ◽  
Subhendu Parida ◽  
Jagarlapudi MK Murthy
Keyword(s):  
Corticospinal Tract ◽  
Complete Recovery ◽  
Left Hemiparesis ◽  
Motor Pathway ◽  
Acute Infarct ◽  
Posterior Fossa Malformations ◽  
Intravenous Alteplase ◽  
Extrapyramidal Motor ◽  
Mr Brain ◽  
Ipsilateral Hemiparesis

A 56-yr-old hypertensive male presented with left-sided weakness of 2-h duration. He made complete recovery from right hemiparesis due to left parietal infarct. Examination showed dysarthria and left hemiparesis (NIHSS 8/42). MR-brain showed both left parietal acute infarct and gliosis from old infarct (Figure-1). He was successfully thrombolysed with intravenous alteplase. Present stroke was diagnosed as ipsilateral hemiparesis, confirmed by DTI (Figure-2). Ipsilateral hemiparesis, mostly seen with posterior fossa malformations and remote infarctions, results from injury to uncrossed corticospinal tract (CST) in patients of remote brain injury or with no decussation of CST or injury to ipsilateral extrapyramidal motor pathway.

The terminations of corticospinal tract axons in the macaque monkey

1985 ◽  
Vol 242 (3) ◽  
pp. 325-337 ◽  
Author(s):  
Diane Daly Ralston ◽  
Henry J. Ralston
Keyword(s):  
Corticospinal Tract ◽  
Macaque Monkey
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