- Onuf’s nucleus is located in Rexed’s lamina IX of the sacral region of the spinal cord and supplies the perineal muscles and the anal and urethral sphincters. (T/F?)
- The posteromarginal nucleus and the substantia gelatinosa are structures in the spinal cord where first order neurons of the spinothalamic tract synapse. (T/F?)
- Onuf’s nucleus is the origin of the preganglionic parasympathetic fibers. (T/F?)
- The intermediolateral nucleus of the spinal cord contains all the preganglionic neurons of the sympathetic autonomic system of the body. (T/F?)
- Onuf’s nucleus is sexually dimorphic, males have more motoneurons in them than females. (T/F?)
- Neurons of the Clarke’s columns give rise to the spinothalamic tract. (T/F?)
68. Rexed laminae
- The posteromarginal nucleus is located in Rexed’s lamina I. (T/F?)
- Rexed’s laminae II and III contain substantia gelatinosa (T/F?)
- Nucleus proprius is located in lamina II. (T/F?)
- Motor nuclei are located in lamina IX. (T/F?)
- The spinal accessory nucleus of the accessory nerve is located in lamina VIII in cervical segments. (T/F?)
- Posterior thoracic nucleus (Clarke’s column) is located in lamina VII in thoracic and lumbal segments. (T/F?)