Lecture 10 part one (SECOND MIDTERM) Flashcards
What indicates the separation between epaxial and hypaxial?
Transverse processes
Cep (biCEP, triCEP) refers to…
the numbers of heads
What are the three layers of epaxial muscles (superficial to deep)?
Erector spinae
Intermediate layer
Deep layer
What are the three layers of erector spinae (lateral to medial)?
Iliocostalis
Longissimus
Transverso-spinalis
Iliocostalis…
Origin:
Insertion:
Origin: sacrum/iliac crest
Insertion: ribs
Longissimus…
Origin:
Insertion:
Origin: sacrum/iliac crest
Insertion: transverse processes
Transverso-spinalis…
Origin:
Insertion:
Origin: sacrum/iliac crest/transverse processes
Insertion: spinous processes
What are the layers of the Intermediate layer?
Multifidus
Semispinalis
Multifidus…
Origin:
Insertion:
Origin: sacrum/iliac crest
Insertion: spinous process
Semispinalis…
Origin:
Insertion:
Origin: transverse processes
Insertion: spinous processes
What does the deep layer of epaxial muscle do?
the deep layer consists of short slips of muscle that connect adjacent vertebrae
What are the 3 layers of hypaxial musculature?
Body wall
Prevertebral
Limbs
What are the subdivisions of the body wall?
Abdominal
Thoracic
Perineal
Neck (odd one out)
What are the subdivisions of the abdominal group (superficial to deep)?
External oblique
Internal oblique
Transversus
The limbs usually don’t receive innervation from…
Instead, from…
dorsal rami
ventral rami
Ventral rami only goes to what structures?
hypaxial
External oblique…
Origin:
Insertion:
Origin: lower 8 ribs
Insertion: top of rectus sheath
Internal oblique…
Origin:
Insertion:
Origin: iliac crest
Insertion: rectus sheath
Transversus…
Origin:
Insertion:
Origin: thoracolumbar fascia
Insertion: sheath below abdominus rectus
What does the neck NOT share with the other subdivisions of the body wall?
the other subdivisions have coelom
What are the subdivisions of the thoracic group?
External intercostal
Internal intercostal
Transversus thoracis
External intercostal fibers go in the same direction as…
external oblique
Internal intercostal fibers go in the same direction as…
internal oblique
External intercostal is homologous to…
external oblique
Internal intercostal is homologous to…
internal oblique
Transversus thoracis…
does NOT have “transverse” fibers; they expand differently
What are the layers of the perineal group (superficial to deep)?
Urogential diaphragm
Pelvic diaphragm
Transversalis fascia
Urogenital diaphragm:
- external anal sphincter
- deep transverse perineal
Pelvic diaphragm:
- coccygeus
- levator ani
What are the only things “left” in the neck region?
What does it lack?
scalenes
coelomic space
What are the strap muscles?
Rectus abdominis Geniohyoid Omohyoid Sternohyoid Sternothyroid Pyramidalis
What consists of the “rectus series” of the strap muscles?
Geniohyoid
Omohyoid
Sternohyoid
Sternothyroid
The linea alba is the “midline” in between..
the rectus abdominis
What covers rectus abdominis?
rectus sheath
Prevertebral musculature consists of:
Longus capitis
Longus colli
Quadratus lumborum
Quadratus lumborum…
Origin:
Insertion:
What does it do?
Origin: iliac crest, lower lumbar vertebrae
Insertion: T12, L1-L4, rib 12
Abducts vertebral column and depresses rib 12
What is the line that marks the change from having the deep leaf of the rectus sheath to NOT having it?
arcuate line
Geniohyoid…
Origin:
Insertion:
Origin: chin
Insertion: hyoid
-lifts the hyoid
Omohyoid…
Origin:
Insertion:
Origin: shoulder
Insertion: hyoid
-depresses the hyoid
Sternohyoid…
Origin:
Insertion:
Origin: sternum
Insertion: hyoid
Sternothyroid…
Origin:
Insertion:
Origin: sternum
Insertion: thyroid
Longus capitis…
Origin:
Insertion:
Origin: cervical vertebrae
Insertion: head (base of skull)
Longus colli…
Origin:
Insertion:
Origin: thoracic vertebrae
Insertion: neck (cervical vertebrae)
Appendicular musculature is a subdivision of…
hypaxial musculature
Ventral ramus further divides into what divisions?
dorsal division and ventral division
If it attaches to the pubic bone, it is in the quadrant…
Cranial ventral
If it attaches to the ischium, it is in the quadrant…
Caudal ventral
If it attaches to the upper part of ilium, it is in the quadrant…
Cranial dorsal
If it attaches to the lower part of ilium, it is in the quadrant…
Caudal dorsal
Colors... Yellow Blue Red Green
Yellow: cranial/dorsal
Blue: cranial/ventral
Red: caudal/dorsal
Green: caudal/ventral
