Muscle Anatomy and Function
This is key concepts in muscle anatomy, function, and biomechanics. It includes muscle strain predictions based on pain location, muscle function loss due to stroke, anatomical analysis of muscle names, muscle origin/insertion and action relationships, and case-based applications like sports injuries. This resource is ideal for students studying anatomy, kinesiology, physical therapy, or related health sciences.
Muscle strain or pulling a muscle may result from overuse injuries or trauma. Typically, muscle strain causes pain around the muscle with movement and with pressure. Predict which muscle or muscles may be strained if a patient complains of pain in each of the following locations:
-Anterior thigh: Quadriceps femoris m group (specifically rectus femoris)
-Posterior forearm: extenor carpi ulnaris m, extensor digitorum m, extensor digiti minimi m, extensor carpi radialis brevis m
-Scapula: supraspinatus m, deltoid m, infraspinatus m, teres minor/major m
-Gluteal region: gluteus medius m, gluteus maximus m
-Posteromedial leg: adductor magnus m, gracilis m
-Cervical region of the back: semispinalis capitis m, spinalis cervicis m, longissimus capitis m, longissimus cervicis m, middle/posterior scalene m
Key Terms
Muscle strain or pulling a muscle may result from overuse injuries or trauma. Typically, muscle strain causes pain around the muscle with movement and with pressure. Predict which muscle or muscles may be strained if a patient complains of pain in each of the following locations:
-Anterior thigh: Quadriceps femoris m group (specifically rectus femoris)
-Posterior forearm: extenor carpi ulnaris m, extensor digitorum m, ext...
A stroke caused by a clot in a blood vessel of the brain may lead to a loss of functions of certain muscles. Which motions would an individual be unable to perform if the following muscles lost function?
-Obricularis oris m: Most likely would lose the ability to purse lips
-Trapezius: Most likely would lose the ability to hold head upright or hyp...
Predict the location, appearance, and function of the extensor carpi ulnaris muscle by looking only at its name.
This muscle is most likely located in the forearm. Its appearance is most likely long and towards the lateral side of the forearm. Its function is ...
The adductor longus muscle originates from the pubic bone of the pelvis and inserts into the medial femur. The semimembranosus muscle originates from the ischial tuberosity of the pelvis and inserts into the medial tibia.
-Predict the actions of each muscle from this information.
The action of the adductor longus muscle is most likely to adduct the leg (pull the l...
The soleus muscle originates from the posterior tibia and fibula and inserts into the posterior calcaneus.
-Predict its action from this information
Since the fibula inserts at the posterior calcaneus and originates at the posterior tib/fib, it must l...
A soccer player falls and injures her lower right limb. Injuries to which lower limb muscle most interferes with her ability to kick the ball?
Injuries to her lower limb muscles that aid in the extension of the knee joint would most affect her ability to kick because to kick a ball you mus...
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| Term | Definition |
|---|---|
Muscle strain or pulling a muscle may result from overuse injuries or trauma. Typically, muscle strain causes pain around the muscle with movement and with pressure. Predict which muscle or muscles may be strained if a patient complains of pain in each of the following locations: | -Anterior thigh: Quadriceps femoris m group (specifically rectus femoris) |
A stroke caused by a clot in a blood vessel of the brain may lead to a loss of functions of certain muscles. Which motions would an individual be unable to perform if the following muscles lost function? | -Obricularis oris m: Most likely would lose the ability to purse lips |
Predict the location, appearance, and function of the extensor carpi ulnaris muscle by looking only at its name. | This muscle is most likely located in the forearm. Its appearance is most likely long and towards the lateral side of the forearm. Its function is the most likely movement of the wrist and forearm |
The adductor longus muscle originates from the pubic bone of the pelvis and inserts into the medial femur. The semimembranosus muscle originates from the ischial tuberosity of the pelvis and inserts into the medial tibia. | -Predict the actions of each muscle from this information. |
The soleus muscle originates from the posterior tibia and fibula and inserts into the posterior calcaneus. | -Predict its action from this information |
A soccer player falls and injures her lower right limb. Injuries to which lower limb muscle most interferes with her ability to kick the ball? | Injuries to her lower limb muscles that aid in the extension of the knee joint would most affect her ability to kick because to kick a ball you must extend at your knee joint. The muscles that aid the most in extending the lower limb are the bicep femoris and vastus lateralis/intermedius/medialis. |