Dissection Learning Objectives Flashcards
Iliacus
attachments- from iliac fossa to lesser trochanter of femur
actions- flexion of thigh at the hip joint
innervation- femoral nerve
Psoas major
attachments- from transverse processes of T12-L4 to lesser trochanter of femur
actions- flexion of thigh at the hip joint
innervation- ventral rami L1-L3
Coccygeus
attachments- from & sacrospinous ligament to coccyx
actions- supports & compresses posterior pelvic floor
innervation- ventral rami S4-5
Iliococcygeus
attachments- from ischium & tendinous arch of obturator internus to coccyx & midline raphe
action- support pelvic viscera
innervation- levator ani nerve (S4), inferior rectal nerve (pudendal S3-4), coccygeal plexus
Pubococcygeus
attachments- pubis & tendinous arch of obturator internus to coccyx & midline raphe & walls of prostate or vagina
actions- support pelvic viscera & compress vagina
innervation- levator ani nerve (S4), inferior rectal nerve (pudendal S3-4), coccygeal plexus
Puborectalis
attachments- pubis & wall of rectum
actions- maintain fecal continence
innervation- levator ani nerve (S4)
Internal abdominal oblique
(lower anterior, upper anterior, & lateral fibers)
attachments- from thoracolumbar fascia to inguinal ligament, iliac crest & rectus sheath
actions- flexion & rotation of the trunk, & compression of the abdominal cavity
innervation- lower thoracic & L1 ventral rami T7-12, L1, iliohypogastric and ilioinguinal, ventral rami
External abdominal oblique
(anterior & lateral fibers)
attachments- from lower 8 ribs to iliac crest & rectus sheath, TL fascia attachment as well?
actions- flexion & rotation of the trunk, & compression of the abdominal cavity
innervation- ventral rami T7-12
Quadratus lumborum
attachments- from 12th rib & transverse processes of L1-4 to iliolumbar ligament & iliac crest
actions- extension & lateral flexion of the trunk, and fixes 12th rib during respiration
innervation- Lumbar plexus ventral rami T12-L3
Rectus abdominis
attachments- from xiphoid process & adjacent costal cartilages of ribs 5-7 to pubic crest & tubercle (symphysis)
actions- flexion of trunk & compression of abdominal cavity
innervation- lower thoracic ventral rami T5-12
Transversus abdominis
attachments- from lower six costal cartilages & thoracolumbar fascia to inguinal ligament, iliac crest & rectus sheath
actions- compression of the abdominal cavity
innervation- lower thoracic T7-12, ventral divisions