Transversus Abdominis | Structure & Function; Activation Tutorial

The video tutorial provides an in-depth look at the transversus abdominis muscle, often referred to as the corset muscle. It covers the muscle's structure, origins, insertions, innervation, and blood supply. The tutorial explains the muscle's actions, including its role in trunk rotation and abdominal compression, and its importance in spinal stability, especially under heavy loads. The video also offers practical guidance on activating the muscle using the hook line position and the drawing in maneuver, emphasizing its endurance capabilities.

What is the nickname often given to the transversus abdominis muscle?

• The belt muscle

• The corset muscle

• The strap muscle

• The girdle muscle

Which nerve provides innervation to the superior parts of the transversus abdominis muscle?

• Subcostal nerve

• Intercostal nerves

• Ilioinguinal nerve

• Iliohypogastric nerve

Which arteries supply blood to the transversus abdominis muscle?

• Femoral and iliac arteries

• Carotid and subclavian arteries

• Superior and inferior epigastric arteries

• Radial and ulnar arteries

What is the primary action of the transversus abdominis when it contracts bilaterally?

• Extending the spine

• Flexing the spine

• Compressing the abdominal viscera

• Ipsilateral trunk rotation

What is the effect of unilateral contraction of the transversus abdominis?

• Ipsilateral trunk rotation

• Trunk extension

• Contralateral trunk rotation

• Trunk flexion

Which layer of the thoracolumbar fascia does the transversus abdominis attach to?

• Middle layer

• Lateral raphe

• Anterior layer

• Posterior layer

How does the transversus abdominis contribute to spinal stability?

• By increasing spinal mobility

• By tensioning the thoracolumbar fascia

• By relaxing the spinal ligaments

• By compressing the vertebral canal

What is the purpose of the drawing-in maneuver?

• To relax the core muscles

• To stretch the abdominal muscles

• To activate the transversus abdominis

• To increase spinal mobility

What type of muscle fibers are predominantly found in the transversus abdominis?

• Type 3 muscle fibers

• Type 2 muscle fibers

• Type 1 muscle fibers

• Type 4 muscle fibers

What is the recommended duration for holding an isometric contraction of the transversus abdominis?

• 15 seconds

• 10 seconds

• 20 seconds

• 5 seconds