What is lumbar plexus? The lumbar plexus is a vital collection of nerves that arise from mostly the lumbar medulla spinalis. The term plexus refers to a “web” of nerves that’s created just lateral to where T12-L5 exit the neural structure via intervertebral foramina. The plexus exists bilaterally and allows nerves to mix with different…
What is Ulnar Nerve? The ulnar nerve arises from C8-T1 nerve roots which form the medial cord of the brachial plexus. The cubital nerve travels down the hand where it moves behind the medial epicondyle of the humerus at the elbow. The nervous doesn’t give branches within the axilla or within the upper arm. It…
Origin of Popliteus muscle The popliteus muscle fibers originate from the lateral condyle of the femur or the posterior horn of the lateral meniscus, a tendon called the popliteus tendon. In the dissections have also shown fibers originating from the styloid portion of the fibular head, which runs obliquely blending with the main muscular structure….
What is a Musculocutaneous Nerve? The brachial plexus is the complex set of nerves originating from the ventral roots of C5-T1 that innervates numerous muscles and cutaneous regions of the upper limb, thorax, and back. The 5 spinal roots form a superior, middle, and inferior trunk. Each of those trunks has an anterior and posterior…
What is Axillary Nerve? The axillary nerve is one of the terminal branches brachial plexus, derived from its posterior cord (C5-6). It travels through the quadrangular space along with the posterior arterial blood vessel and vein. It is a mixed nerve, meaning that it’s both motor and sensory fibers that innervate important muscles of the…
What is Brachial Plexus? The Brachial Plexus could be a network of nerves that offers rise to all or any of the motor and sensory nerves of the upper extremity. It rises from the anterior rami of spinal nerves C5-T1 that sustain various combinations and splits into trunks and divisions until they finally create their…
Vastus lateralis muscle
Vastus intermedialis muscle
What is Longus Capitis Muscle? Longus capitis is a deeper anterior neck muscle that travels in front of the cervical spine. Combine with rectus capitis anterior, rectus capitis lateralis, longus cervicis, or the anterior scalene muscle, it creates the prevertebral layer of neck muscles. These muscles are wrapped or rolled up in the prevertebral layer of the cervical fascia. Bilateral contraction of longus capitis muscle flexes the combined head or…
