What are the roots of the axillary nerve?

The axillary nerve is formed within the axilla area of the upper limb. It is a direct continuation of the posterior cord from the brachial plexus – and therefore contains fibres from the C5 and C6 nerve roots.

What are the roots of the lumbosacral plexus?

The lumbosacral plexus (LP) is derived from the anterior rami of the L1-S4 nerve roots. The LP consists of the upper (L1-L4) and the lower (L4-S4) plexus. Similar to BP, prefixed and postfixed LP can be seen. The LP supplies motor and sensory functions of the ipsilateral low limb and pelvis.

What is root value of lumbar plexus?

The lumbar plexus is a complex neural network formed by the lower thoracic and lumbar ventral nerve roots (T12 to L5) which supplies motor and sensory innervation to the lower limb and pelvic girdle.

Which nerve roots form the lumbosacral trunk?

The lumbosacral trunk consists of a combination of ventral rami of the fourth and fifth lumbar nerve roots that join with S1 nerve fibers contributing to the sacral plexus.

What happens if axillary nerve is damaged?

Axillary nerve dysfunction is nerve damage that can lead to a loss of movement or sensation in the shoulder. Conditions associated with axillary nerve dysfunction include fracture of the humerus (upper arm bone), pressure from casts or splints, and improper use of crutches.

What nerves run through your armpit?

Radial nerve dysfunction is a problem with the radial nerve. This is the nerve that travels from the armpit down the back of the arm to the hand. It helps you move your arm, wrist, and hand.

What is a lumbosacral plexus injury?

Overview. Neurologic signs of lumbosacral plexus injuries consist of motor deficit with flaccid paralysis associated with sensory deficits to all types of stimulation in the territory of the damaged nerve roots: a lower motor neuron paralysis.

What is root value of nerves?

The parts of the body innervated by a nerve root depend on its location. For example, a cervical nerve root is more likely to be involved with the arm, whereas a lumbar nerve root is more likely to be involved with the leg. Nerve roots help to innervate the side of the body where they are located.

What are the 3 branches of the lumbar plexus?

The Branches

Iliohypogastric Nerve. The iliohypogastric nerve is the first major branch of the lumbar plexus.
Ilioinguinal Nerve. The ilioinguinal nerve follows the same anatomical course as the larger iliohypogastric nerve.
Genitofemoral Nerve.
Lateral Cutaneous Nerve of the Thigh.
Obturator Nerve.

How lumbosacral trunk is formed?

The lumbosacral trunk (also called the lumbosacral cord) is formed primarily by the L5 root, with a contributing branch from the L4 root (see Figure C5-1). It then travels a relatively long distance in close contact with the ala of the sacrum, which is adjacent to the sacroiliac joint.

What do the lumbosacral nerves control?

Functions of the Lumbar Spinal Nerves L2, L3, and L4 spinal nerves provide sensation to the front part of the thigh and inner side of the lower leg. These nerves also control movements of the hip and knee muscles. The L5 spinal nerve controls hip, knee, foot, and toe movements.

Where does the lumbosacral trunk begin and end?

Structure The lumbosacral trunk comprises the whole of the ventral rami of L5 and a part of L4. It appears at the medial margin of the psoas major and runs downward over the pelvic brim to join the first sacral nerve.

Is the lumbosacral trunk part of the lumbar plexus?

Dissection of side wall of pelvis showing sacral and pudendal plexuses. The lumbosacral trunk is nervous tissue that connects the lumbar plexus with the sacral plexus . The lumbosacral trunk comprises the whole of the ventral rami of L5 and a part of L4.

What are the values of the lumbar root?

Remember the progression of the lumbar root values: Formed from ventral rami of L4-S4; Contribution of L4-L5 is from Lumbosacral trunk. The nerves forming the sacral plexus converge towards the lower part of the greater sciatic foramen and unite to form a flattened band.

What happens to the lumbosacral trunk during labour?

The lumbosacral trunk may be compressed by the fetal head during the second stage of labour. This causes some muscle weakness in the legs. A full recovery is usually expected. Ramus communicans.Sacral symphatetic with S1.

What are the roots of the axillary nerve? The axillary nerve is formed within the axilla area of the upper limb. It is a direct continuation of the posterior cord from the brachial plexus – and therefore contains fibres from the C5 and C6 nerve roots. What are the roots of the lumbosacral plexus? The…