Proximal Distal Forelimb
Proximal Distal Forelimb - Related Videos
12:46
A Novel Method for Assessing Proximal and Distal Forelimb Function in the Rat: the Irvine, Beatties and Bresnahan (IBB) Forelimb Scale
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Cited by 54 •
2010
Here we will describe a rodent behavioral assay that can detect recovery of both proximal and distal forelimb function including digit movements during a naturally occurring behavior that does not require extensive training or deprivation to enhance motivation.
03:26
Measuring Compound Muscle Action Potentials in Mouse Forelimb Muscles In Vivo
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2025
This video demonstrates an in vivo technique for measuring compound muscle action potential (CMAP) in mice. It outlines the steps for setting up electrodes, stimulating forelimb neurons that innervate muscle fibers, and recording muscle responses. The technique assesses neuronal demyelination and functional neuron loss.
08:59
Acquisition of a High-precision Skilled Forelimb Reaching Task in Rats
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Cited by 19 •
2015
A paradigm is presented to analyze the acquisition of a high-precision skilled forelimb reaching task in rats.
02:21
Direct Reconnection of Cervical Nerves to Restore Forelimb Mobility in a Mouse
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2025
Source: Gao, Z., et al. A Mouse Model of Direct Anastomosis via the Prespinal Route for Crossing Nerve Transfer Surgery. J. Vis. Exp. (2021).This video demonstrates restoring forelimb movement in a mouse via direct cervical nerve reconnection. It begins with a mouse with a paralyzed right forelimb due to a transected right C7 nerve at its nerve root. The left C7 nerve is severed, guided to the right via the prespinal route, and sutured with the right C7 nerve. The surgical site is then cleaned...
10:36
Vascularized Composite Hand Allograft Procurement and Preparation for Distal and Proximal Forearm Allotransplantation: A Stepwise Approach
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2025
Here, we present a protocol for procuring and preparing vascularized composite hand allografts during distal or proximal forearm transplantation.
FAQs
Coordination depends on dividing a movement into complementary control demands. Cortical networks can generate commands that position the shoulder and upper arm while also supporting the timing and force needed at the wrist, hand, and digits. This arrangement links whole-limb transport with endpoint accuracy during reaching, grasping, and manipulation.
The corticospinal pathway provides a route for cortical motor commands to reach spinal circuitry. Signals travel toward spinal interneurons and motor neurons, which connect higher-level planning with the neural output that executes limb actions. Considering this chain helps explain how cortical organization becomes observable movement rather than treating anatomy and behavior as separate systems.
Sensory feedback contributes information that can refine both force and timing during movement. In a forelimb task, this feedback can be considered alongside descending commands to understand whether the hand reaches a target, applies an appropriate force, or adjusts manipulation as the movement unfolds. Its inclusion is therefore important when interpreting motor control.
Proximal and distal control are complementary rather than interchangeable. Shoulder and upper-arm actions establish limb position, creating the conditions for wrist, hand, and digit actions that demand precision. This distinction gives neuroscientists a way to relate the location of movement along the limb to different behavioral requirements within the same reaching or grasping task.
It connects anatomical pathways with observable motor behavior. Researchers can use the framework to examine how neural commands support reaching, skilled hand use, and manipulation, while sensory feedback helps account for force and timing. Comparing limb location with behavioral demand can clarify how distributed neural control contributes to coordinated action.
In rehabilitation contexts, this organization supports distinguishing difficulties with limb positioning from difficulties involving precise hand use. Considering reaching alongside grasping or digit manipulation can show whether recovery is occurring across proximal and distal functions. Because corticospinal pathways and sensory feedback contribute to control, the framework also links behavioral changes with neural mechanisms.
Separating proximal positioning from distal precision lets neuroscience relate cortical networks, corticospinal pathways, spinal circuitry, and sensory feedback to specific behavioral demands. This layered view is useful for explaining why reaching and skilled hand use can be analyzed together while still preserving their distinct control requirements and contributions to coordinated movement.