SERRATUS
POSTERIOR
SUPERIOR
SPINALIS
THORACIS
LEVATORES
COSTARUM
LONGISSIMUS
THORACIS
ROTATORES
INTERCOSTALS
MULTIFIDUS
ILIOCOSTALIS
BODY OF KNOWLEDGE:
ANATOMY OF THE THORACIC SPINE
There are multiple muscles in your thoracic spine region,
most of which also run through your cervical spine or
lumbar spine regions (or both). Here, get to know the
deeper muscles that attach to your thoracic spine, as well as
those that share a soft-tissue relationship with the thoracic
spine and rib cage.
TRANSVERSOSPINALIS
As a group, these muscles connect different portions of
each vertebra to adjacent or semi-adjacent vertebrae.
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ERECTOR SPINAE MUSCLES
As a group, these muscles provide postural support for your
trunk and facilitate multiple motions of your torso.
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SERRATUS POSTERIOR SUPERIOR
This muscle connects your upper three thoracic vertebrae to
ribs 2–5. It helps elevate your ribs when you inhale.
RESPIRATORY DIAPHRAGM (NOT SHOWN)
This muscle attaches to the inside of your lower six ribs; you
may notice it when it’s spasming with the hiccups.
INTERCOSTALS
These muscles are situated between each rib. They stabilize
your rib cage and assist in breathing.
LEVATORES COSTARUM
These muscles connect the transverse processes of each
thoracic vertebra to the rib below and help you inhale.
A vertebra, dissected
SPINOUS PROCESSThese are bony projections off
thebackofeachvertebra.Alongsideeachspinousprocess
is an arch-like structure called the lamina, which provides
a major point of attachment for your spine’s muscles and
ligaments.
INTERVERTEBRAL DISCS(NOT SHOWN) These
arethespine’sshockabsorbers.Eachdiscformsa
fibrocartilaginous joint (a symphysis) to allow slight
movement of vertebrae and hold adjacent vertebrae
together.
TRANSVERSE PROCESSThese bony projections off each
side of each vertebra are the attachment sites for your
spine’smusclesandligaments.
VERTEBRAL BODYThis thick oval segment of bone forms
the front of each vertebra. A protective layer of compact
bone encircles a cavity of spongy bone tissue.
SPINOUS
PROCESS
VERTEBRAL
BODY
TRANSVERSE
PROCESS
21
december 2017 / january 2018
yogajournal.com.sg