The cervicis and splenius capitis muscles are vital for the function of the trapezius. These muscles are often injured by whiplash injuries from car accidents. These two muscles can cause spasm and tension headaches, as well as severe neck pain. These two muscles are responsible for preventing the person from bending their neck backward.
Let’s see…
You will feel significant pain when you bend your neck sideways or turn your head to the painful side. If you see someone who has difficulty turning their head and neck to the left, check for problems with the cervicis muscles on one side and the splenius capitis muscles on the other.
Because they have trouble turning their neck and head, this person will have to turn their entire body. Because of their neck rotation difficulties, they will complain about difficulty driving. The splenius cervicalis (neck) muscle is located from the third to sixth thoracic spines, T3-T6, and inserts into the transverse processes between the first through fourth cervical vertebrae (C1–C4).
Both muscles were supplied with nerve supply by the middle and lower cervical nerves. The irritation of the C5 or C6 nerve roots can cause neck pain and shoulder pain. Both roots supply the deltoid muscles. The deltoid muscle has three parts: the anterior deltoid is located at the front of your shoulder, the middle of your shoulder (middle and posterior deltoid), and the back of your shoulder (posterior).
Keep in Mind
It is located at the front of the collar bone, the acromion, and the spine of your shoulder blade. It attaches on the deltoid tuberosity of the arm bone (humerus). It is supplied via the axillary nervous, which carries the C5-C6 spinal nerve root fibers. The anterior deltoid lifts the arm forward (flexion), while the middle deltoid moves it away from the trunk (abduction). The posterior deltoid extends the arm backward (extension).
It is used to lift heavy objects and is also used in driving, writing, typing, etc. The forward motion of the arm, known as shoulderflexion, is caused by the contraction of large and powerful muscles such as the pectoralis major and long head of biceps. The muscles that bring the arm backward (shoulder Extension) must be lengthened to stabilize the flexion movement.
Conclusion
Three major muscles perform shoulder extension, namely the latissimus major, teres minor, and the posterior deltoid. The poster deltoid can be affected by C5 and C6 nerve roots, which can lead to weakness, pain, and spasm. If the deltoid is not functioning properly, lifting movements can be performed by shrugging your shoulder. This is an action of the uppertrapezius. The trapezius muscle is weak enough to lift weights, causing pain in the neck and shoulders. The deltoid pain cannot be treated by treating the deltoid muscles alone.
