Stepping by chronic spinal cats

Area of Science:

• Neuroscience
• Motor Control
• Spinal Cord Injury Research

Background:

• Spinal cord injury (SCI) disrupts motor function.
• Understanding recovery mechanisms after SCI is crucial for developing therapies.

Purpose of the Study:

• To investigate the functional recovery of locomotion after complete spinal cord transection in adult cats.
• To assess the development of stepping ability, hindquarter support, and coordination following SCI.

Main Methods:

• Adult cats underwent complete spinal cord transection.
• Postoperative locomotion was evaluated using treadmill testing.
• Analysis included the onset of stepping, hindquarter support, and kinematic parameters of gait.

Main Results:

• All cats eventually achieved treadmill stepping, with onset varying from 1 to 6 weeks post-surgery.
• No cats regained hindquarter support within 2 months.
• Permanent deficits in forelimb-hindlimb coordination and increased variability in step cycle parameters were observed.

Conclusions:

• Locomotor recovery after spinal cord transection is possible but incomplete.
• Deficits in coordination and timing suggest disruption of supraspinal control or altered spinal circuitry.
• Further research is needed to elucidate the precise mechanisms underlying these persistent motor impairments.