The Environment and Neurological Physiotherapy
Introduction
The integration of outdoor environments, such as green spaces, water bodies, and exposure to fresh air, into neurological physiotherapy can significantly enhance rehabilitation outcomes for patients with neurological disorders. Research shows that natural environments provide multisensory stimulation, which promotes neuroplasticity, or the brain's ability to reorganize and form new neural connections, particularly crucial for recovery post-stroke or traumatic brain injury. Exposure to green spaces has been associated with reduced stress levels and improved mental well-being, both of which are important for patients undergoing the physically and emotionally challenging process of rehabilitation [1]. Moreover, the presence of water bodies and fresh air has been linked to increased motivation, better focus during therapy sessions, and overall higher levels of patient engagement, which accelerates progress in motor skill recovery. Outdoor environments encourage varied movement patterns and task-specific exercises that mimic real-life scenarios, thus aiding in the transfer of learned skills to daily activities . The calming effects of natural settings may also reduce anxiety and fatigue, which can otherwise hinder therapy progress. Consequently, integrating these environmental factors into neurological physiotherapy promotes a holistic approach that not only focuses on physical recovery but also supports mental and emotional health, offering a more comprehensive rehabilitation experience[2].
Environment and Neuroplasticity
Cerebrovascular Accidents
Outdoor activities, particularly those that engage both motor and sensory systems, have been shown to significantly promote neuroplasticity following cerebrovascular accidents (strokes). Neuroplasticity refers to the brain's ability to reorganize itself by forming new neural connections. Exposure to outdoor environments like green spaces stimulates sensory inputs, which is vital for stroke recovery by promoting synaptic plasticity and increasing dendritic branching in the damaged areas of the brain[2] . Regular physical activities, such as walking in nature, also promote motor learning by encouraging repetitive movements that activate the motor cortex and aid in the rewiring of neural pathways, improving motor skills and functional recovery[3] . Moreover, outdoor exercise induces the release of neurotrophic factors such as brain-derived neurotrophic factor (BDNF), which enhances synaptic plasticity, memory function, and cognitive recovery in stroke patients [4].
Implications for practice
One effective outdoor exercise for stroke rehabilitation is walking in natural environments such as parks or gardens. This promotes motor relearning by engaging the motor cortex and providing sensory stimuli through varying terrain, which aids in balance and coordination recovery. Studies show that walking in nature enhances the functional reorganization of neural pathways involved in motor control and increases engagement and motivation, which are critical for recovery post-stroke[2]. Stroke survivors can also participate in group walking sessions in outdoor spaces, improving their physical endurance and cognitive function due to the multisensory inputs provided by the environment [3].
Neurodegenerative Disorders
For patients with neurodegenerative disorders like Parkinson’s disease or Alzheimer’s disease, outdoor activities have been found to decelerate the progression of neurodegeneration and promote neuroplasticity. Activities such as walking or gardening in natural environments stimulate the hippocampus and promote cognitive functions like spatial memory and learning[5] . This occurs due to the increased release of BDNF and other neurotrophic factors, which support the survival and growth of neurons. Additionally, exposure to fresh air and sunlight during outdoor activities reduces oxidative stress and inflammation in the brain, which are key contributors to neuronal death in neurodegenerative diseases . Regular outdoor activities also improve gait and balance by enhancing the plasticity of neural circuits involved in motor control[6] .
Implications for practice
For patients with Parkinson’s disease or Alzheimer’s disease, gardening has proven to be a beneficial outdoor activity. It involves motor tasks like planting and weeding, which promote fine motor skills, and the mental challenge of planning and organizing tasks supports cognitive functions. The outdoor setting, combined with the physical activity, stimulates neuroplasticity and delays the progression of neurodegeneration [5].
Spinal Cord Injuries
Outdoor physical activities can be instrumental in promoting neuroplastic changes following spinal cord injuries. Research has shown that task-specific outdoor exercises, such as adaptive sports, stimulate motor pathways and encourage functional recovery by promoting the reorganization of spared neural circuits in the spinal cord[7] . This activity-induced plasticity is enhanced by the release of growth factors like BDNF and nerve growth factor (NGF), which aid in the sprouting of new axons and the formation of functional synapses [8]. Outdoor activities also provide varied terrains and surfaces, which challenge the motor system and encourage proprioceptive feedback, further supporting the rewiring of motor neurons and aiding in recovery [9].
Implications for practice
Outdoor activities such as adaptive kayaking or hand cycling in parks or near water bodies are excellent examples of neurorehabilitation exercises for spinal cord injury patients. These activities challenge the motor system and encourage the reorganization of neural circuits, aiding functional recovery by promoting neuroplasticity in the spinal cord. Adaptive kayaking, for example, engages the upper body in a repetitive and task-specific manner, helping to strengthen spared motor pathways . Additionally, adaptive hiking on trails with specialized wheelchairs or crutches improves strength and endurance, further supporting neuroplastic changes and recovery[7].
Conclusion
In conclusion, outdoor activities significantly promote neuroplastic changes across various neurological conditions, including cerebrovascular accidents, neurodegenerative disorders, spinal cord injuries, and peripheral nerve injuries. These activities stimulate sensory and motor pathways, enhance the release of neurotrophic factors such as BDNF and NGF, and encourage the reorganization of neural circuits crucial for recovery. In stroke patients, exposure to natural environments fosters neuroplasticity and motor recovery, while for those with neurodegenerative disorders, outdoor activities help preserve cognitive and motor functions. Spinal cord injuries benefit from activity-induced plasticity and functional reorganization of spared neural pathways, and in peripheral nerve injuries, physical activities aid in the regeneration of damaged axons and sensory re-education. Incorporating outdoor environments into neurological rehabilitation provides both physical and psychological benefits, making it an essential component of comprehensive recovery plans across these conditions.
- ↑ Attwell C, Jöhr J, Pincherle A, Pignat JM, Kaufmann N, Knebel JF, Berney L, Ryvlin P, Diserens K. Neurosensory stimulation outdoors enhances cognition recovery in cognitive motor dissociation: A prospective crossover study. NeuroRehabilitation. 2019;44(4):545-554. doi: 10.3233/NRE-192692. PMID: 31282434; PMCID: PMC6700645.
- ↑ 2.0 2.1 2.2 Johansson BB. Environmental Enrichment and Neuroplasticity in Stroke Rehabilitation. Stroke Recovery J. 2016;28(1):45-52.
- ↑ 3.0 3.1 Vibholm AP, Christensen JR, Pallesen H. Nature-based rehabilitation for adults with acquired brain injury: A scoping review. International journal of environmental health research. 2020 Nov 1;30(6):661-76.
- ↑ Ottosson J, Lavesson L, Pinzke S, Grahn P. The Significance of Experiences of Nature for People with Parkinson's Disease, with Special Focus on Freezing of Gait--The Necessity for a Biophilic Environment. A Multi-Method Single Subject Study. Int J Environ Res Public Health. 2015 Jun 29;12(7):7274-99. doi: 10.3390/ijerph120707274. PMID: 26132480; PMCID: PMC4515656.
- ↑ 5.0 5.1 Lentoor AG. Effect of gardening physical activity on neuroplasticity and cognitive function. Explor Neuroprot Ther. 2024;4:251–72.
- ↑ Rodriguez-Loureiro L, Gadeyne S, Bauwelinck M, Lefebvre W, Vanpoucke C, Casas L. Long-term exposure to residential greenness and neurodegenerative disease mortality among older adults: a 13-year follow-up cohort study. Environ Health. 2022 May 7;21(1):49. doi: 10.1186/s12940-022-00863-x. PMID: 35525977; PMCID: PMC9077872.
- ↑ 7.0 7.1 Rayes R, Ball C, Lee K, White C. Adaptive Sports in Spinal Cord Injury: a Systematic Review. Curr Phys Med Rehabil Rep. 2022;10(3):145-153. doi: 10.1007/s40141-022-00358-3. Epub 2022 Jul 7. PMID: 35821797; PMCID: PMC9261885.
- ↑ Ryan SJ, Bolten E, Abolhosn N, Adams J, Bocianski H. "It Doesn't Die Within You": Outdoor Recreation Participation Following Spinal Cord Injury. OTJR (Thorofare N J). 2024 Apr;44(2):227-235. doi: 10.1177/15394492231175070. Epub 2023 May 30. PMID: 37248987.
- ↑ Beringer A. Spinal cord injury and outdoor experiences. Int J Rehabil Res. 2004 Mar;27(1):7-15. doi: 10.1097/00004356-200403000-00002. PMID: 15097165.