The nervous system includes the spinal cord, while the skeletal system includes the backbone. The spinal cord is made up of lengthy nerves, whereas the backbone is made up of vertebrates. The spinal cord is located within the backbone.
The human backbone is, on average, larger than the spinal cord. The backbone protects the spinal cord and supports the body. The spinal cord is in charge of a number of bodily functions. We’ll look at the spinal cord and backbone in depth in this section.
The question of how these messages from the brain reach the receptor organs is crucial. The brain is connected to the dorsal tubular spinal cord, forming the central nervous system. These organs serve as a central control point, integrating incoming data and determining suitable actions. The brain and the nerves that go throughout the body are connected via the spinal cord.
Spinal Cord
The spinal cord is a cylinder that runs down the middle of the spine. It’s a structure made up of nerve bundles and message-carrying cells.
The spinal cord is made up of a network of tissues and cells. The spinal cord serves as a link or connection between the brain and the rest of the body’s nerves. It’s separated into five distinct areas. The spinal cord is around 18 inches long in adults.
- Cervical- Eight pairs of spinal nerves emerge from the cervical region. The neck is covered in this area
- Thoracic- There are 12 pairs of spinal nerves in the thoracic region. It is placed in the centre of the table
- Lumbar- There are five pairs of spinal nerves in the lumbar region. It can be found in the lower back
- Sacral nerves— There are five pairs of spinal nerves in the sacrum
- Coccyx nerve- Only one pair of spinal nerves make up the coccyx nerve. It is situated in the lower back
Backbone
The backbone is also known as the vertebral column. It is a flexible column that stretches from the neck to the tail. It is composed of a number of bones. The spine is made up of the vertebral column and the spinal cord.
The backbone, also known as the vertebral column, is a protective covering of bone. The spinal cord is covered and protected by this. Vertebrae are the bones that make up the vertebral column. A spinal disc sits between each pair of vertebrae.
A strong outer shell surrounds a gel-like interior in spinal discs. They protect the vertebrae and spinal cord by acting as a cushion. The purpose of this function is to transfer body weight when walking or standing. It is the body’s primary support. It supports the head all the way to the top. It is connected to the shoulder bones, ribs, and back musculature.
Protection Covering of Spinal Cord
The three membranes that protect the spinal cord are collectively known as meninges. The numerous layers of the meninges can be broken down into the following categories:
- The dura mater is the tough outer layer
- The arachnoid mater is the middle layer. An epidural gap exists between the outermost and intermediate layers. It’s where anaesthetic is injected during surgery to make the patient feel less pain
- The pia mater is the thin inner layer. Through subarachnoid space, the pia mater is kept isolated from the middle layer
- Cerebrospinal fluid is a clear, colourless fluid that flows in the central canal of the spinal cord and is present in the subarachnoid region
Function of the Spinal Cord
The spinal cord performs the following functions:
- The spinal cord transmits and receives impulses from the brain and governs the majority of reflex functions. Patellar reflex, for example, is a knee jerk when tapped in a certain place
- During reflex actions, it modulates voluntary muscular movements
- The spinal neurons synchronise several involuntary actions, including stomach and oesophageal peristalsis, contraction of the urinary bladder muscle, and dilatation and contraction of heart muscles
- The white matter’s Myelin sheath governs the speed with which nerve impulses travel to and from the brain, as well as providing electrical insulation
Symptoms of Spinal Cord Injury
The following are the signs and symptoms of a spinal cord injury:
- Back discomfort is unbearable
- Loss of movement
- Sensory organs suffer from a loss of sensation
- Any part of the body is weak and paralysed
- Responses that are excessive
Cause of Spinal Cord Injury
Spinal cord injuries can be caused by a variety of factors, including:
- Traumatic spinal injury can be caused by damage to any of the vertebrae in the vertebral column, as well as vertebral dislocation
- Non-traumatic spinal damage can be caused by arthritis, inflammation, osteoporosis, bone softening, and disc degeneration
- Spinal cord injuries can occur as a result of athletic activity or diving in shallow water
Conclusion
The spinal cord is a component of the central nervous system that transports nerve impulses from the brain to the body’s organs. It extends practically the whole length of the vertebral column behind the medulla oblongata.
Gray matter forms an interior H-shaped cross-section of the spinal cord. The grey matter is surrounded by white matter. There are 31 pairs of nerves in the spine. To transmit messages to and from the brain, each pair comprises a sensory neuron and a motor nerve. Our body’s reflex functions are carried out by the spinal cord, which also controls the involuntary actions of internal body organs.
As a result, it is critical to avoid spinal cord injuries, as severe spinal cord injuries result in paralysis as well as damage to the sensory and motor functioning of many body parts.