Anatomy and Physiology 2401 Chapter 13 Lecture Quiz Spinal Cord Answer Key

Anatomy and Physiology 2401 Chapter 13 Spinal Tracts Spinal Tract Ascending or descending ? Sensory or motor? Starts where? Path / ends where? Action or what it controls? Gracile Ascending sensory Mid-thoracic and lower body below T6 Lower body  up spinal cord  medulla oblongata (brain stem)  thalamus  cerebral cortex Senses vibration, visceral pain, touch, lower limb proprioception Cuneate Ascending sensory Chest and upper limb above T6 Upper body  up spinal cord  medulla oblongata (brain stem)  thalamus  cerebral cortex Senses vibration, visceral pain, touch, upper limb proprioception Spinothalamic Ascending sensory Skin Skin  spinal cord  thalamus  cerebral cortex Senses pain, pressure, temperature, light touch, tickle, itch Spinoreticular Ascending sensory Skin, SQ, bone, joint Skin, other tissues  up spinal cord  reticular tissue in pons and medulla (brain stem)  thalamus  cerebral cortex Senses pain, especially pain from tissue injury Spinocerebellar Ascending sensory Sensors in muscles and tendons Muscle sensors  up spinal cord  medulla and pons (not thalamus)  cerebellum Proprioceptive information from limbs and trunk Corticospinal Descending motor Cerebral cortex Cerebrum  pyramids in medulla (brain stem)  spinal cord  muscles Precise, finely coordinated movements Tectospinal Descending motor Midbrain (tectum) Midbrain  cervical spinal cord  cranial nerves VI, VII, VIII eye, head and neck muscles Coordinates head and eyes in response to sights and sounds Reticulospinal Descending motor Reticular formation of pons and medulla (brainstem) Brainstem  spinal cord  muscles of arms and legs Posture, locomotion, and balance. Also has descending pain tracts to lessen pain sensations to brain. Vestibulospinal Descending motor Vestibular nuclei in brainstem Brainstem  spinal cord  neck muscles and extensor muscles of limbs Coordinate vestibular (balance) information from inner ear with posture