Podcast
Questions and Answers
Match the muscle group with its correct location in the transverso spinalis group:
Match the muscle group with its correct location in the transverso spinalis group:
Semispinalis = Most superficial and lateral Multifidus = Deepest and medial Rotatores = Deeper and medial Levator costarum = Not part of the transverso spinalis group
Match the muscle group with its correct primary function:
Match the muscle group with its correct primary function:
Semispinalis = Extension and rotation of the back Multifidus = Proprioception and stabilization of the vertebral column Rotatores = Connecting transverse processes of adjacent vertebrae Interspinalis = Connecting spinous processes of adjacent vertebrae
Match the muscle with its correct number of vertebrae crossed:
Match the muscle with its correct number of vertebrae crossed:
Rotatores longus = Two vertebrae Rotatores brevis = One vertebra Levator costarum brevis = One segment Levator costarum longus = Two segments
Match the muscle group with its correct primary attachment:
Match the muscle group with its correct primary attachment:
Match the muscle group with its correct classification based on location:
Match the muscle group with its correct classification based on location:
Match the muscle group with its correct role in vertebral column health:
Match the muscle group with its correct role in vertebral column health:
Match the muscle group with its correct potential consequence of muscle spasms:
Match the muscle group with its correct potential consequence of muscle spasms:
Match the muscle group with its correct importance in heavy lifting:
Match the muscle group with its correct importance in heavy lifting:
Flashcards
Transverso spinalis muscle group
Transverso spinalis muscle group
A group of deep back muscles responsible for extension and rotation.
Semispinalis
Semispinalis
The most superficial and lateral muscle in the transverso spinalis group, crossing 4-6 vertebrae.
Multifidus
Multifidus
A deeper muscle that crosses 2-4 vertebrae in the transverso spinalis group.
Rotatores
Rotatores
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Interspinalis
Interspinalis
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Intrinsic back muscles
Intrinsic back muscles
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Levator costarum
Levator costarum
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Proprioception
Proprioception
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Study Notes
Transverso spinalis muscle group
- Located between the vertebral bones.
- More medial and deeper than the erector spinae muscle group.
- Responsible for extension and rotation of the back.
- 3 groups of muscles within the transverso spinalis group:
- Semispinalis: Most superficial and lateral, crosses 4-6 vertebrae.
- Multifidus: Deeper and medial, crosses 2-4 vertebrae.
- Rotatores: Deepest and medial, crosses 1-2 vertebrae.
- Rotatores have two muscles, longus and brevis:
- Rotatores longus: Crosses two vertebrae.
- Rotatores brevis: Crosses one vertebra.
- Importance of the transverso spinalis group:
- Primarily involved in proprioception, sensing and stabilizing the vertebral column.
- Crucial for preventing movements that could damage the spinal cord or discs.
Minor deep Group of muscles
- A minor deep group of muscles exists within the transverso spinalis group.
- Includes 3 groups of muscles:
- Interspinalis: Between spinous processes of adjacent vertebrae.
- Intertransversarii: Between transverse processes of adjacent vertebrae.
- Levator costarum: Between transverse processes and ribs.
- Levator costarum:
- Levator costarum brevis: Crosses one segment.
- Levator costarum longus: Crosses two segments.
Intrinsic vs Extrinsic Muscles
- Intrinsic muscles of the back are directly attached to the vertebrae.
- Extrinsic muscles of the back are attached to the upper limb or structures outside the vertebral column.
- Transverso spinalis is an intrinsic deep muscle group.
- Erector spinae is an intrinsic intermediate muscle group, often classified as the deepest layer of intrinsic muscles.
Additional Notes
- All muscles within the transverso spinalis and minor deep groups are involved in proprioception, maintaining proper vertebral column alignment and stability.
- Muscle spasms after injury often involve these deep muscles, preventing further movement and potentially leading to more serious issues.

- Maintaining strength and flexibility in both back and abdominal muscles is crucial for protecting the vertebral column, particularly during heavy lifting.
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