Thoracic Spine Anatomy

Introduction

Physiotherapy in Edmonton for Mid Back

Welcome to Revive Spine and Sport Physiotherapy Clinic's patient resource about Thoracic Spine problems.

The section of the spine found in the upper back is called the thoracic spine. It goes from the base of the neck to the bottom of the rib cage. Knowing the main parts of the thoracic spine and how these parts work is important as you learn to care for your back problem.

Two common anatomic terms are useful as they relate to the thoracic spine. The term anterior refers to the front of the spine. The term posterior refers to the back of the spine. The front of the thoracic spine is therefore called the anterior thoracic area. The back of the thoracic spine is called the posterior thoracic area.

This guide gives a general overview of the anatomy of the thoracic spine. It should help you understand:

  • what parts make up the thoracic spine
  • how these parts work

Hear from some of our patients who we treated for Back Pain
Paul helped me in a situation where no one else would. My wife had extreme sciatica pain after she delivered a baby. He helped me throughout the treatment when she wasnt able to put any weight on...
 Paul helped me in a situation where no one else would. My wife had extreme sciatica pain after she delivered a baby. He helped me throughout the treatment when she wasnt able to put any weight on the leg, we are still visiting Paul for her physio sessions. Paul is best at what he does. 
Mandeep R
Edmonton, AB
I went to see Paul for a soft tissue injury and he has fixed that as well he has help with back problems I have had for 20 years Thumbs up for Paul assume place to go for injuries
 I went to see Paul for a soft tissue injury and he has fixed that as well he has help with back problems I have had for 20 years Thumbs up for Paul assume place to go for injuries 
Dwight M
Edmonton, AB
I have been to a lot of physio places over my work career. This by far is the best I have been to. Very intense and targeted to the area needed. In my case the strengthening of my leg and the lower...
 I have been to a lot of physio places over my work career. This by far is the best I have been to. Very intense and targeted to the area needed. In my case the strengthening of my leg and the lower back 
Ray H
Edmonton, AB
I came here with back pain and Dr. Siva has been an absolute lifesaver. His expertise and dedication have been nothing short of remarkable.
 I came here with back pain and Dr. Siva has been an absolute lifesaver. His expertise and dedication have been nothing short of remarkable. 
Thomas N
Edmonton, AB
I have had such a good experience at Revive Physiotherapy. I am so grateful for the sessions I have had here with Siva as they have helped ease so much of my back pain. Siva is always patient, kind...
 I have had such a good experience at Revive Physiotherapy. I am so grateful for the sessions I have had here with Siva as they have helped ease so much of my back pain. Siva is always patient, kind and informative when showing me how to do new exercises and stretches. Revive provides a very clean and relaxed space and the front staff is super friendly as well. I highly recommend coming here! 
Paige P
Edmonton, AB
I have been to a few physio places for back problems, but I am just blown away by this place. If you have the chance, go see Shane. He is truly a very knowledgeable and professional chiropractor. He...
 I have been to a few physio places for back problems, but I am just blown away by this place. If you have the chance, go see Shane. He is truly a very knowledgeable and professional chiropractor. He doesn't just crack your back. He takes the time to explain why you have the pain in the first place and gives you ideas for exercises that will take the pain away forever. He can explain why your whole body is hurting (e.g. he explained why my back and achilles tendonitis are connected). Simply amazing. Just started going to this place, but I am already so impressed and feeling the benefits. Definitely recommend! 
The Anxious Moose
Edmonton, AB
Went in with multiple years of back pain and decreased mobility. After the first session there was a noticeable improvement. As I have continued with my therapy my pain continues to decrease and my...
 Went in with multiple years of back pain and decreased mobility. After the first session there was a noticeable improvement. As I have continued with my therapy my pain continues to decrease and my mobility improves. I wish I hadn’t waited so long. 
J A
Edmonton, AB
Revive Spine and Sport Physiotherapy Clinic is one of the best clinics for Physiotherapy. Dr. Sudharshan is a great doctor and I would highly recommend him to anyone who needs Physiotherapy. He knows...
 Revive Spine and Sport Physiotherapy Clinic is one of the best clinics for Physiotherapy. Dr. Sudharshan is a great doctor and I would highly recommend him to anyone who needs Physiotherapy. He knows what he is doing and is quite friendly to ensure that you have a pleasant time during your visit. I had a lower back issue which was undiagnosed for the longest time. Dr. Sudharshan correctly identified the issue and gave me an action plan to work with. Quite a knowledgeable and friendly doctor. In addition to that, the front staff is very kind and extremely helpful. They have tried their best to accommodate me whenever I needed. I would highly recommend Revive! 
Sreya C
Edmonton, AB
Had 5 visits with Rachel Fowler for treatment of a lower herniated disc. All treatment was explained before implementing. Treatment was spot on as I'm as good as before. Would defiantly recommend and...
 Had 5 visits with Rachel Fowler for treatment of a lower herniated disc. All treatment was explained before implementing. Treatment was spot on as I'm as good as before. Would defiantly recommend and will go absolutely revisit Revive and Rachel in the future if I need treatment. The clinic is clean with efficient staff. 5 stars. 
Brad F
Edmonton, AB
Had 5 visits with Rachel Fowler for treatment of a lower herniated disc. All treatment was explained before implementing. Treatment was spot on as I'm as good as before. Would defiantly recommend...
 Had 5 visits with Rachel Fowler for treatment of a lower herniated disc. All treatment was explained before implementing. Treatment was spot on as I'm as good as before. Would defiantly recommend and will go absolutely revisit Revive and Rachel in the future if I need treatment. The clinic is clean with efficient staff. 5 stars. 
Ivan J
Edmonton, AB
I absolutely love Revive! The receptionists are always so kind and always find a way to squeeze me in. Shayne is the best chiropractor I’ve ever had! Super knowledgeable, easy to chat with & just an...
 I absolutely love Revive! The receptionists are always so kind and always find a way to squeeze me in. Shayne is the best chiropractor I’ve ever had! Super knowledgeable, easy to chat with & just an overall amazing chiropractor. My boyfriend & I both see Shayne for our chiropractic needs & even if I moved to the other side of Edmonton, I would drive to see Shayne! Thank you guys so much for everything you’ve done to help me with my back & my partner with his I wish I could give you guys more than 5 stars 
Allison P
Edmonton, AB
Paul was wonderful in helping me regain strength in my lower back. Thank you!
 Paul was wonderful in helping me regain strength in my lower back. Thank you! 
John T
Edmonton, AB
I got a back strain two months before and approached Revive for therapy.I was given 15 sessions by physiotherapists Mr. Varghese Paul and Mr.Shiva.I was guaranteed complete recovery at the end of...
 I got a back strain two months before and approached Revive for therapy.I was given 15 sessions by physiotherapists Mr. Varghese Paul and Mr.Shiva.I was guaranteed complete recovery at the end of these sessions.As said,I have a great relief at present and I am continuing exercises advised by Mr.Varghese Paul.I am sincerely thankful for the care given to me and I would recommend this highly professional place to my friends and family. 
Anoop P
Edmonton, AB
I love this clinic! Staff is friendly and professional. Facility is clean and well designed. But most importantly I was looked very well by Siva (one of the physiotherapist). I initially went there...
 I love this clinic! Staff is friendly and professional. Facility is clean and well designed. But most importantly I was looked very well by Siva (one of the physiotherapist). I initially went there due to dizziness from a past concussion but was so pleased that I also asked for advice for a long recurring problem I have with my back (slipped disc). Siva took the time to explain me what was going wrong in both cases and how we would solve the problem. He gave me clear exercises that have been very effective over time. Siva is extremely knowledgeable. After my second visit I was already convinced and referred my spouse for he frozen shoulder. She has seen improvement too. I would absolutely recommend that you give the clinic a try! 
Hugo G
Edmonton, AB
Really helped my back and hip pain. The hip pain was almost completely gone after my first visit, and the stretches and exercises given being simple and easy to do at home make the back pain much more...
 Really helped my back and hip pain. The hip pain was almost completely gone after my first visit, and the stretches and exercises given being simple and easy to do at home make the back pain much more manageable. I would recommend anybody to come here if they have body pain. 
Rochelle C
Edmonton, AB
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Important Structures

The important parts of the thoracic spine include:

  • bones and joints
  • nerves
  • connective tissues
  • muscles
  • spinal segment

This section highlights important structures in each category.

Bones and Joints

The human spine is made up of 24 spinal bones, called vertebrae. Vertebrae are stacked on top of one another to create the spinal column. The spinal column is the body's main upright support.

 

 

From the side, the spine forms three curves. The neck, called the cervical spine, curves slightly inward. The thoracic spine curves outward. The low back, also called the lumbar spine, curves slightly inward. An inward curve in the spine is called lordosis. An outward curve, as in the thoracic spine, is called kyphosis. The kyphosis is shaped like a C with the opening in front.

The middle 12 vertebrae make up the thoracic spine. Doctors often refer to these vertebrae as T1 to T12. The large bump on the back of the lower part of the neck is the seventh cervical vertebra, called C7. It connects on top of T1. The lowest vertebra of the thoracic spine, T12, connects below the bottom of the rib cage to the first vertebra of the lumbar spine, called L1.

Each vertebra is made of the same parts. The main section of each thoracic vertebra from T1 to T12 is formed by a round block of bone, called the vertebral body. Each vertebra increases slightly in size from the neck down. The increased size helps balance and support the larger muscles that connect to the lower parts of the spine.

A bony ring attaches to the back of each vertebral body. This protective ring of bone surrounds the spinal cord, forming the spinal canal. Two pedicle bones connect directly to the back of the vertebral body. Two lamina bones join the pedicles to complete the ring. The lamina bones form the outer rim of the bony ring. When the vertebrae are stacked on top of each other, the bony rings form a hollow tube that surrounds the spinal cord and nerves. The laminae provide a protective roof over these nerve tissues.

A bony knob projects out at the point where the two lamina bones join together at the back of the spine. You can feel these projections, called spinous processes, as you rub your fingers up and down the middle of your back. Bony knobs also point out from the side of the bony ring, one on the left and one on the right. These projections are called transverse processes.

Projections

Between the vertebrae of each spinal segment are two facet joints. The facet joints are located on the back of the spinal column. There are two facet joints between each pair of vertebrae, one on each side of the spine. A facet joint is made of small, bony knobs that line up along the back of the spine. Where these knobs meet, they form a joint that connects the two vertebrae. The alignment of the facet joints of the thoracic spine allows freedom of movement as you twist back and forth or lean side to side.

Facet Joints

The surfaces of the facet joints are covered by articular cartilage. Articular cartilage is a slick, rubbery material that covers the ends of most joints. It allows the ends of bones to move against each other smoothly, without friction.

Articular Cartilage

On the left and right side of each vertebra is a small tunnel called a neural foramen. (Foramina is the plural term.) The two nerves that leave the spine at each vertebra go through the foramina, one on the left and one on the right. The intervertebral disc (described later) sits directly in front of the opening. A bulged or herniated disc can narrow the opening and put pressure on the nerve. A facet joint sits in back of the foramen. Bone spurs that form on the facet joint can project into the tunnel, narrowing the hole and pinching the nerve.

Neural Foramen

Nerves

The hollow tube formed by the bony rings on the back of the spinal column surrounds the spinal cord. The spinal cord is like a long wire made up of millions of nerve fibers. Just as the skull protects the brain, the bones of the spinal column protect the spinal cord.

The spinal cord travels down from the brain through the spinal column. In the thoracic spine, the spinal canal is narrower than in the rest of the spine, giving very little extra space for the spinal cord as it passes through the thoracic spine.

Narrow Spinal Canal

Between the vertebrae, two large nerves branch off the spinal cord, one on the left and one on the right. The nerves pass through the neural foramina of each vertebra. These spinal nerves group together to form the main nerves that go to the organs and limbs. The nerves of the thoracic spine mainly control the muscles and organs of the chest and abdomen.

Nerves in Spinal Canal

Connective Tissues

Connective tissues are networks of fiber that hold the cells of the body together. Ligaments are strong connective tissues that attach bones to other bones. Several long ligaments connect on the front and back sections of the vertebrae. The anterior longitudinal ligament runs lengthwise down the front of the vertebral bodies. Two other ligaments run full length within the spinal canal. The posterior longitudinal ligament attaches on the back of the vertebral bodies. The ligamentum flavum is a long elastic band that connects to the front surface of the lamina bones. Thick ligaments also connect the ribs to the transverse processes of the thoracic spine.

A special type of structure in the spine called an intervertebral disc is also made of connective tissue. The fibers of the disc are formed by special cells, called collagen cells. The fibers may be lined up like strands of nylon rope or crisscrossed like a net.

An intervertebral disc is made of two parts. The center, called the nucleus, is spongy. It provides most of the shock absorption in the spine. The nucleus is held in place by the annulus, a series of strong ligament rings surrounding it.

Two Parts of Intevertebral Disc

Discs in the thoracic spine are much thinner than in the cervical and lumbar spine. As a result, there is generally less movement between the vertebrae of the thoracic spine.

Muscles

The muscles of the thoracic spine are arranged in layers. Those closest to the skin's surface run from the back of the vertebrae to the shoulder blades. Others wrap around the rib cage and connect to the shoulders. Strap-shaped muscles called erector spinae make up the middle layer of muscles. These muscles run up and down over the lower ribs and thorax (the rib cage), and cross to the low back. The deepest layer of muscles attaches along the back of the spine bones, connecting the vertebrae. Muscles also connect from one rib to the next.

Muscles

Spinal Segment

A good way to understand the anatomy of the thoracic spine is by looking at a spinal segment.

Spinal Segment

Each spinal segment includes two vertebrae separated by an intervertebral disc, the nerves that leave the spinal column at each vertebra, and the small facet joints that link each level of the spinal column.

Summary

Many important parts make up the anatomy of the thoracic spine. Understanding the regions and structures of the thoracic spine can help you become more involved in your health care and better able to care for your back problem.

Portions of this document copyright MMG, LLC.