POST.TRUNK
Which muscle elevates the scapula?
Levator scapulae
Which muscle is the primary muscle of inspiration?
DIAPHRAGM
Which muscle divides the neck into anterior and posterior triangles?
Sternocleidomastoid (SCM)
During a sit-up, which muscle is the primary mover?
Rectus abdominis
The erector spinae consists of which three columns?
Iliocostalis, Longissimus, Spinalis
Which muscle elevates the ribs during inspiration?
External intercostals
Which muscle forms the floor of the posterior triangle?
Scalene muscles
Which intrinsic back muscle is most developed in the lumbar region and helps stabilize vertebrae?
Multifidus
List the 5 superficial extrinsic muscles of the back
Trapezius
Latissimus dorsi
Levator scapulae
Rhomboid minor
Rhomboid major
Which intercostal muscles primarily assist with forced expiration?
INTERNAL INTERCOSTALS
List the four infrahyoid muscles
Sternohyoid
Omohyoid
Sternothyroid
Thyrohyoid
Which abdominal muscle is most important for "drawing in" the abdomen and stabilizing the core
Transversus abdominis
The deepest intrinsic back muscles belong to the __________ group
Transversospinalis
List the four muscles of the anterolateral abdominal wall.
External oblique
Internal oblique
Transversus abdominis
Rectus abdominis
List the four suprahyoid muscles
Digastric
Stylohyoid
Mylohyoid
Geniohyoid
A patient has thoracic outlet syndrome due to compression between the anterior and middle scalene muscles. Which two structures are most commonly compressed?
Brachial plexus
Subclavian artery
Name the muscles in the transversospinalis group.
Semispinalis
Multifidus
Rotatores
What is the function of the diaphragm?
Primary muscle of inspiration; contraction increases thoracic volume and decreases intrathoracic pressure, drawing air into the lungs.
The accessory nerve is Cranial Nerve __________
XI (11)
A patient cannot shrug the affected shoulder and has weakness turning the head against resistance. Which nerve is most likely injured?
Accessory nerve (CN XI)