Dominic Stone
Muscle excursion is a term used to describe the range of motion a muscle undergoes during movement. It is an important factor in determining muscle recovery after tendon repair, as well as in regulating sarcomere number in growing muscles. Measuring muscle excursion during tendon repair can help physicians estimate the potential for muscle recovery. Additionally, muscle excursion has been linked to increased collagen content in muscles after tendon rupture. Studies have also shown that chronic skeletal muscle stretch can lead to an increase in serial muscle fiber sarcomere number, which is correlated with functional excursion in normal muscles.
| Characteristics | Values |
|---|---|
| Definition | "Muscle excursion was significantly lower in the transferred muscle compared to controls." |
| "Muscle excursion is important in regulating sarcomere number." | |
| "Functional muscle excursion was determined as a range of muscle lengths where the muscles were mathematically predicted to generate active tension >50% of Po." | |
| Use | "Measuring the muscle excursion during tendon repair may help physicians estimate the potential of muscle recovery in cases of delayed tendon repair." |
| "Muscle excursion observed during operation can be a prognostic indicator of muscle recovery after delayed tendon repair." | |
| "The amount of muscle recovery after tendon repair in terms of muscle excursion independently depended on the timing of repair and on the muscle excursion observed during repair." | |
| "The release procedure did not appreciably affect soleus architecture." | |
| Tendon rupture | "Passive skeletal muscle excursion after tendon rupture correlates with increased collagen content in muscle." |
| "The increase of collagen content in turn induces the decrease of muscle excursion after tenotomy." | |
| Limb reconstructive surgery | "Limb reconstructive surgeries, which force the muscles to stretch and adapt to new functional demands, are commonly practiced clinically." |
| "Functional outcomes in terms of muscle contractile properties are not always satisfactory in those procedures." | |
| Tendons | "The tendons of each group were repaired 2, 4, and 6 weeks after tenotomy." |
| Sarcomere number | "Sarcomere numbers for the released TA were significantly larger for the released TA than those for the control and sham-operated TAs." |
| "Increased excursion results in increased serial sarcomere addition following TA release in growing animals." | |
| "Chronic skeletal muscle stretch typically increases serial muscle fiber sarcomere number." | |
| "Serial sarcomere number correlates with functional excursion in normal muscle." | |
| Recovery | "The average muscle excursion of the soleus muscles was 11.6 mm (89% of the baseline, 16% increase after repair) in group A, 9.8 mm (69% of the baseline, 15% increase after repair) in group B, and 7.3 mm (51% of the baseline, 1% increase after repair) in group C." |
Explore related products
$9.99 $12.99
$9.99 $12.99
What You'll Learn
Muscle excursion and tendon repair
Muscle excursion is the range of muscle lengths where the muscles are mathematically predicted to generate active tension. It is important in regulating sarcomere number. Sarcomeres are the basic contractile units of a muscle fibre.
Tendon injuries are commonly encountered in clinical settings and may result from trauma or arthritis. If tendon repair after injury is delayed, the muscle-tendon unit contracts and several pathologic changes occur in the muscle, including increased intramuscular connective tissue, decreased capillary density, Z-disc streaming, early muscle fiber necrosis, and decreased twitch tension, eventually resulting in irreversible muscle contracture. When the muscle contracture has not progressed to an irreversible state, direct repair or interpositional tendon grafting can be used.
A study by Jeon et al. in 2011 used a rabbit soleus model to determine whether muscle excursion observed during surgery can be a prognostic indicator of muscle recovery after delayed tendon repair. Eighteen rabbits underwent tenotomy of the soleus muscles bilaterally and were divided into three groups according to the period from tenotomy to repair. The tendons of each group were repaired 2, 4, and 6 weeks after tenotomy. The excursion of each soleus muscle was measured at the time of tenotomy (baseline), at 2, 4, and 6 weeks after tenotomy, and 8 weeks after tendon repair. The amount of muscle recovery after tendon repair in terms of muscle excursion depended on the timing of repair and the muscle excursion observed during repair. The regression model predicted that the muscle excursion recovered on average by 0.6% as the muscle excursion at the time of repair increased by 1% after adjusting for the timing of repair. This study suggests that measuring the muscle excursion during tendon repair may help physicians estimate the potential of muscle recovery in cases of delayed tendon repair.
Another study by Koh et al. in 2017 found a correlation between the change in muscle excursion and collagen content after tendon rupture and delayed repair. Passive skeletal muscle excursion after tendon rupture correlated with increased collagen content in the muscle. The decrease in passive muscle excursion after tenotomy significantly correlated with the increase in collagen content in the muscle after tenotomy. This suggests that the recovery of muscle excursion after tendon repair may depend on the collagen content in the muscle at the time of tendon repair.
Building Big Muscles: Fast and Furious Way
You may want to see also
Explore related products
$17.91 $24.99
Muscle excursion and sarcomere number
Muscle excursion is a term used to describe the range of motion of a muscle. It is an important factor in muscle function and recovery, and can be influenced by factors such as tendon repair and joint kinematics.
The relationship between muscle excursion and sarcomere number has been studied in various contexts, particularly in relation to muscle growth, adaptation, and recovery. Sarcomeres are the basic contractile units of muscle fibres, and their number can vary depending on various factors, including muscle excursion.
Several studies have investigated the link between muscle excursion and sarcomere number in growing animals, specifically in rabbit tibialis anterior muscles. The results suggest that increasing muscle excursion leads to an increase in serial sarcomere addition, indicating that muscle excursion may play a role in regulating sarcomere number during growth. This relationship was further supported by studies showing that decreasing muscle excursion resulted in a decrease in serial sarcomere addition.
However, other studies have found a disconnect between muscle excursion and sarcomere number, particularly in the context of muscle adaptation to stretched tendon transfer. These studies reported that muscle excursion was significantly lower in the transferred muscle compared to controls, while the serial sarcomere number had increased. This suggests that muscle morphological adaptation after chronic stretch may not accurately predict the muscle's functional properties.
Additionally, muscle excursion has been studied in the context of muscle recovery after tendon repair. It was found that the amount of muscle recovery in terms of muscle excursion depended on the timing of repair and the muscle excursion observed during the repair. Measuring muscle excursion during tendon repair may help physicians estimate the potential for muscle recovery in cases of delayed tendon repair.
In summary, muscle excursion and sarcomere number are important factors in muscle function and adaptation. While there is some evidence to suggest that muscle excursion may regulate sarcomere number, particularly during growth, the relationship is complex and may vary depending on the specific context and other influencing factors. Further research is needed to fully understand the relationship between muscle excursion and sarcomere number and its implications for muscle health and function.
Mastering Muscle Memory: Innervations and the Brain's Power
You may want to see also
Explore related products
Muscle excursion and collagen content
Muscle excursion refers to the range of muscle lengths where the muscles are predicted to generate active tension. It is important in regulating sarcomere number, which is the basic structural element of skeletal muscle.
Several studies have investigated the correlation between muscle excursion and collagen content. One study found that passive muscle excursion decreased sequentially over time after tenotomy, while total collagen content increased. Type I collagen content increased significantly, type III collagen content decreased significantly, and type IV collagen content showed no significant change. These changes were significant after 4 weeks of injury. There was a significant negative correlation between the ratio of hydroxyproline content (a measure of collagen content) in the muscle after tenotomy and the ratio of muscle excursion after tenotomy.
Another study examined the effect of muscle excursion on muscle recovery after tendon repair in a rabbit soleus model. The results suggested that measuring muscle excursion during tendon repair may help estimate the potential for muscle recovery in cases of delayed tendon repair. The amount of muscle recovery depended on the timing of repair and the muscle excursion observed during repair.
Additionally, one study found that muscle excursion was significantly lower in the transferred muscle compared to controls, even though serial sarcomere number had increased. This suggests that morphological muscle adaptation does not necessarily predict functional muscle adaptation.
Collagen content within muscles is important for connective tissue function and force transmission. Ingestion of collagen-derived protein sources, such as gelatin and collagen peptides, may stimulate connective tissue protein synthesis due to their high proline and glycine contents. Exercise training-induced increases in collagen content and cross-linking are critical for transmitting greater contractile forces from the muscle to the tendon, ligament, and bone.
The Muscular Complexity of the Penis Explained
You may want to see also
Explore related products
Muscle excursion and muscle recovery
Muscle excursion refers to the range of muscle lengths where the muscles can generate active tension. It is an important factor in muscle recovery, especially after tendon repair or limb reconstructive surgeries.
During tendon repair, measuring muscle excursion can help physicians estimate the potential for muscle recovery. This is particularly relevant in cases of delayed tendon repair, where the muscle-tendon unit contracts and undergoes pathologic changes, including increased intramuscular connective tissue, decreased capillary density, and early muscle fiber necrosis.
Studies have shown that the amount of muscle recovery after tendon repair depends on the timing of the repair and the muscle excursion observed during the procedure. The regression model predicted that the muscle excursion recovered by an average of 0.6% for every 1% increase in muscle excursion at the time of repair, after adjusting for the timing of the repair.
Additionally, muscle excursion plays a role in regulating sarcomere number, which is the number of muscle fibers within a muscle. In rabbit models, it was observed that increasing muscle excursion resulted in an increased sarcomere number. This suggests that muscle excursion may influence muscle growth and adaptation.
Furthermore, in limb reconstructive surgeries, muscles are forced to stretch and adapt to new functional demands. However, this does not always lead to satisfactory functional outcomes in terms of muscle contractile properties. While morphological muscle adaptation may occur, it does not necessarily predict functional muscle adaptation.
In summary, muscle excursion is a critical factor in muscle recovery, especially after tendon repair and reconstructive surgeries. It can help predict the potential for muscle recovery and may influence muscle growth and adaptation. However, the relationship between muscle excursion and muscle function is complex, and further research is needed to fully understand its impact on muscle recovery and performance.
Muscle Milk Nutrition: Is It Worth the Hype?
You may want to see also
Explore related products
Muscle excursion and joint kinematics
Muscle excursion is a term used to describe the range of motion a muscle group can move through to accomplish a specific task. It is the distance travelled by a muscle from its origin to its insertion during a specific movement. Muscle excursion is an important factor in muscle recovery after tendon repair and can be used as a prognostic indicator of muscle recovery.
Joint kinematics refers to the study of joint movement, including the angles and motions of bones that occur at joints. It involves the analysis of joint angles, velocities, and accelerations during movement. Joint kinematics is essential for understanding the function and performance of the musculoskeletal system.
The relationship between muscle excursion and joint kinematics is closely intertwined. Muscle excursion directly influences joint kinematics by determining the range of motion available at a particular joint. The length and contractile properties of a muscle affect the degree of movement possible at a joint. For example, a muscle with a larger excursion will allow for a greater range of motion at the associated joint.
Additionally, joint kinematics can impact muscle excursion. The position and movement of bones at a joint can influence the length and tension of the associated muscles. Different joint angles and movements can cause muscles to stretch or shorten, thereby affecting their excursion. For instance, in an ankle joint motion from 160 degrees (full plantarflexion) to 40 degrees (full dorsiflexion), the muscle excursion for the released tibialis anterior (TA) was significantly larger (40%) than the control or sham-operated TAs.
Furthermore, muscle excursion and joint kinematics play a crucial role in muscle adaptation and functional outcomes. For example, in limb reconstructive surgeries, muscles are forced to stretch and adapt to new functional demands. However, the morphological adaptation of muscles does not always predict their functional adaptation. Changes in muscle excursion may not directly correlate with increased serial sarcomere number, which refers to the number of contractile units within a muscle. This indicates that muscle excursion and joint kinematics are complex factors that influence muscle function and performance.
In summary, muscle excursion and joint kinematics are interconnected aspects of musculoskeletal function. Muscle excursion influences the range of motion available at a joint, while joint kinematics can impact muscle length and tension. Understanding their relationship is essential for evaluating muscle recovery, adaptation, and overall joint function.
Relaxing Your Muscles: Simple Techniques for Quick Relief
You may want to see also
Frequently asked questions
Muscle excursion is the range of muscle lengths where the muscles are mathematically predicted to generate active tension.
Muscle excursion and sarcomere number are correlated. An increase in muscle excursion typically results in an increase in sarcomere number.
Muscle excursion observed during tendon repair can be a prognostic indicator of muscle recovery. The amount of recovery depends on the timing of repair and the muscle excursion observed during repair.
