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Start for freeUnderstanding Neck Muscle Anatomy for Better Movement
The human neck is a complex structure supported by various muscles that facilitate movement in multiple directions. This guide will delve deeply the primary muscles responsible for neck flexion, extension, and even some that do not directly contribute to neck movements but play crucial roles in other functions.
The Role of Sternocleidomastoid in Neck Flexion
At the forefront of neck flexion is the sternocleidomastoid muscle. This significant muscle is aptly named after its attachment points—the sternum, clavicle, and mastoid process. It primarily functions to pull your head forward towards your chest. When you nod your head as if to indicate 'yes,' you're primarily using this muscle.
Beneath the sternocleidomastoid lie three scalene muscles—anterior, middle, and posterior. These muscles collectively aid in bending the head forward, akin to putting your chin on your chest. However, engaging these muscles on one side (unilaterally) results in lateral flexion—bending the head sideways towards the shoulder.
Other Essential Muscles in Neck Movements
Moving beyond these front-line muscles, we encounter the levator scapulae, which despite being located in the neck region, does not contribute to its movement. Instead, this muscle elevates the scapula during actions like shrugging your shoulders.
Adjacent to the levator scapulae are two critical muscles for neck extension—the splenius capitus and semi-spinalis capitus. These muscles are overlaid by a portion of the trapezius. Together, they work to maintain an upright head posture and assist in pulling the head back towards the spine.
Additional Muscles Underneath Sternocleidomastoid
It's also worth mentioning some often-overlooked muscles located under the sternocleidomastoid. One such muscle is the superior belly of omohyoid, which extends towards the shoulder (hence 'omo' indicating shoulder). Right next to it lies another vital muscle—the sternohyoid, which connects directly to your sternum.
These hyoid-related muscles are pivotal for various throat movements and support functions related to speech and swallowing.
Learning More About Hyoid Muscles
If you're intrigued by how these smaller yet significant hyoid muscles function or their role beyond what's visible externally, consider checking out dedicated resources or videos that provide a more focused exploration of this area.
By understanding these key muscular structures and their specific roles, you can appreciate how our bodies perform simple yet vital actions like turning our heads or expressing gestures through movements.
Article created from: https://youtu.be/JtWZPHtB0fY
