What is the pathway of the brachial plexus?
The brachial plexus passes from the neck to the axilla and supplies the upper limb. It is formed from the ventral rami of the 5th to 8th cervical nerves and the ascending part of the ventral ramus of the 1st thoracic nerve. Branches from the 4th cervical and the 2nd thoracic ventral ramus may contribute.
Where is brachial plexus located?
The brachial plexus is a network of nerves in the shoulder that carries movement and sensory signals from the spinal cord to the arms and hands. Brachial plexus injuries typically stem from trauma to the neck, and can cause pain, weakness and numbness in the arm and hand.
What is the function of the brachial plexus?
The brachial plexus is a major network of nerves transmitting signals responsible for motor and sensory innervation of the upper extremities, including the shoulder, arm, and hand.
What is the brachial region?
Brachial region – Regio brachii Located between the shoulder and the elbow, the brachial region (Regio brachialis) is much shorter in proportion in domestic Mammals, and especially in great Ungulates, than in the human species. The rest of the arm, or the proper brachial region connects craniomedially to the chest.
Why is brachial plexus formed?
The brachial plexus is formed by the anterior primary rami of C5 through T1 and provides sensory and motor innervation of the upper extremity. The trunks can be found within the posterior triangle of the neck, between the anterior and middle scalene muscles.
What is obturator nerve?
The obturator nerve arises from the lumbar plexus and provides sensory and motor innervation to the thigh. This nerve provides motor innervation to the medial compartment of the thigh and as a result, is essential to the adduction of the thigh.
Where does lumbosacral plexus start?
The lumbosacral plexus is formed by the anterior rami of the nerves (spinal segments T12–S4) to supply the lower limbs.
What are the roots and branches of the brachial plexus?
Structure of the brachial plexus, including the roots, trunks, cords and branches. Three nerves arise from the roots, the first of which is the dorsal scapular nerve that carries fibers from the fourth and fifth cervical spinal nerves and innervates the rhomboid muscles and the levator scapulae muscle.
Where does myelin come from in the brachial plexus?
These cells secrete the substance myelin that lines the nerves and ensures that messages can travel rapidly to and from the brain. The brachial plexus arises from nerve roots that emerge from the spinal cord, travel down through the neck (the cervicoaxillary canal), over the first rib, and into the armpit.
Which is part of the spinal cord forms the plexus?
The plexus is formed by the anterior rami (divisions) of cervical spinal nerves C5, C6, C7 and C8, and the first thoracic spinal nerve, T1. In this article, we shall look at the anatomy of the brachial plexus – its formation and anatomical course through the body.
How does Erb’s palsy affect the brachial plexus?
Erb’s palsy refers to an injury to the upper roots of the brachial plexus (typically C5-6). It most commonly occurs as a result of a stretching injury during a difficult vaginal delivery. Nerves affected – the peripheral nerves derived from C5-6 roots are most affected.