What nerves are affected by T12 and L1?
The lumbar plexus in the human arises from T12, L1, L2, L3, and L4 spinal nerves. The main nerves formed by the plexus are the femoral nerve, the obturator nerve, and the lateral femoral cutaneous nerve.
What nerves are affected by T6 and T7?
Thoracic Nerve Functions
- T1 and T2 (top two thoracic nerves) feed into nerves that go into the top of the chest as well as into the arm and hand.
- T3, T4, and T5 feed into the chest wall and aid in breathing.
- T6, T7, and T8 can feed into the chest and/or down into the abdomen.
What muscles are innervated by T12?
Subcostal nerve (T12). The subcostal nerve provides sensory innervation to the region under the umbilicus and also provides motor innervation to the pyramidalis and quadratus lumborum muscles.
Which of the following is an action of the Spinalis?
spinalis muscle, any of the deep muscles of the back near the vertebral column that, as part of the erector spinae (sacrospinalis) muscle group, assist in extension (e.g., bending backward), lateral flexion (bending to the side), and rotation of the spine.
What happens when you break T7?
In general, a patient with a fractured T7 would experience pain when moving, and have difficulty standing for long periods. Patients with associated rib fractures may sometimes even have pain with breathing (particularly when taking big breaths).
What does T7 nerve control?
The nerves in the area of a vertebra control specific parts of the body. For example, the 7th cervical nerve (C7) in the neck area controls the triceps (the muscle in the upper arm), while the thoracic nerves (T2 through T7) control the chest muscles.
What part of the body does T12 affect?
A T12 spinal cord injury affects lower body functions such as walking and bowel and bladder functions. Fortunately, individuals with T12 spinal cord injuries generally have normal, full functioning of their upper bodies, which allows a great deal of independence.
What does the Spinalis dorsi do?
It is divided into three parts: Spinalis dorsi, spinalis cervicis, and spinalis capitis….
| Spinalis | |
|---|---|
| Artery | Lateral sacral artery |
| Nerve | Posterior branch of spinal nerve |
| Actions | Laterally: Flex the head and neck to the same side. Bilaterally: Extend the vertebral column. |
| Antagonist | Rectus abdominis muscle |
What are the actions of the spinalis cervicis muscle?
Actions of the Spinalis Cervicis Muscle: Bilateral action: extendsand hyperextends the cervical (neck) portion of the vertebral column. Muscle anatomy is hard! Simplify your studies and learn faster using these time-saving muscle anatomy reference charts.
What does the spinalis innervate?
Spinalis. The spinalis is the body’s most medial, or closest to the midline of the body, deep back muscle and originates at the spinous processes (bony projections at the back of each vertebra) of the lower spinal vertebrae. It inserts there, as well as at the skull’s base. It innervates at the posterior (back) branches of spinal nerves C2 to L3.
Where do the fibers of the spinalis cervicis originate?
The fibers of spinalis cervicis are also irregular and poorly developed. However, when they are present they originate from the spinous processes C7 – T1 as well as the caudal part of the nearby nuchal ligament.
What is the spinalis muscle?
The spinalis muscle is a subsection of the erector spinae, which is a confluence of tendons and muscles that is located near the spine. The spinalis is the body’s most medial, or closest to the midline of the body, deep back muscle and originates at the spinous processes (bony projections at the back of each vertebra) of the lower spinal vertebrae.
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