Muscular group of the dorsal spine that originates at the sacrum, ilium, and lumbar vertebrae and attaches at the ribs and upper thoracic vertebra; the function is to maintain upright posture and extend the vertebral column.
Pathological preoccupation with erotic ideas and behavior; delusional belief that the patient is romantically involved with a celebrity or desirable person; associated with acute mania and schizophrenia.
Three vertical bands of back muscles: the iliocostalis, longissimus, and spinalis. The erector spinae muscles begin in a wide tendon running along the iliac crest to the sacrum and in the lower lumbar and sacral spinous processes, they end along the back in angles of the lower ribs and on the transverse processes of the thoracic and cervical vertebrae, they are innervated by dorsal rami of the spinal nerves, and they act to extend (bend backward) the vertebral column and neck or to twist the back.