Back Nerves Anatomy

Spinal cord and nerve root anatomy. T11 is the 11th thoracic vertebra.

Topographic And Functional Anatomy Of The Spinal Cord Gross

A dorsal back posterior sensory root and a ventral front anterior motor root.

Back nerves anatomy. Compression of these nerves in the back can cause cauda equina syndrome which requires a full neurological assessment and potentially an mri scan to see if the patient requires immediate surgical decompression. The peripheral nerves include both motor nerves and sensory nerves. The spinal nerves are relatively large nerves that are formed by the merging of a sensory nerve root and a motor nerve root.

There are seven cervical vertebrae at the top followed by 11 thoracic vertebrae five lumbar vertebrae at the lower back and five fused vertebrae at the bottom to create the sacrum. These nerves are made up of nerve fibers called sensory fibers mechanoreceptor fibers sense body movement and pressure against the body and. These nerve roots emerge directly from the spinal cordsensory nerve roots from the back of the spinal cord and the motor nerve roots from the front of the spinal cord.

Peripheral nerves comprise the peripheral nervous system. It is designed to be incredibly strong protecting the highly sensitive nerve roots yet highly flexible providing for mobility on many different planes. Cervical spine nerve roots.

Lumbar spine nerve roots. For most spinal segments the nerve roots run through the bony canal and at each level a pair of nerve roots exits from the spine. Parasympathetic neurons in the spinal cord pass through the sacral nerves in the lower back to reach the pelvic organs such as the bladder and reproductive organs to control their functions.

In the neck the nerve root is named for the lower segment that it runs between eg. It consists of 5 lumbar vertebra that are numbered 1 through 5 from top to bottom ie. The atlas is also known as c1 because it is the first cervical vertebra.

C6 nerve root at c5 c6 segment. The nerve roots pass out of the spinal canal through the intervertebral foramen where they feed the body either anteriorly motor or posteriorly sensory. A nerve that exits the lower back has peripheral branches that extend all the way down to the toes.

Spinal anatomy and back pain spinal anatomy is a remarkable combination of strong bones flexible ligaments and tendons large muscles and highly sensitive nerves. The anatomy of the lumbar spine is quite complex. The anterior divisions supply the front of the spine including the limbs.

The posterior divisions are distributed to the muscles behind the spine. Here we will attempt to provide a brief overview of lumbar spinal anatomy. The lumbar spine makes up the the lower end of the spinal column.

The cauda equina is formed from the spinal nerves which arise from the end of the spinal cord. Sensory nerves are nerves that receive sensory stimuli telling us how something feelswhether it is hot cold or painful. The fibers of the sensory root carry sensory impulses to the spinal cordpain temperature touch and position sense proprioceptionfrom tendons joints and body surfaces.

Each spinal nerve is attached to the spinal cord by two roots. L1 l2 l3 l4 and l5. Between the opposing functions of the sympathetic and parasympathetic divisions of the ans the nervous system is effectively able to control all of the organs of the abdomen and pelvis.

Spinal Nerves Lumbar