ANATOMY AND PHYSIOLOGY QUESTIONS
ANSWERS COMPLETE A+
◉ Posterior column pathway.
Answer: Fine touch, vibration, proprioception; decussates in
medulla
◉ Fasciculus gracilis.
Answer: Lower body
◉ Fasciculus cuneatus.
Answer: Upper body
◉ Medial lemniscus.
Answer: Tract after decussation in medulla
◉ Spinocerebellar tract.
Answer: Unconscious proprioception
◉ Posterior spinocerebellar.
,Answer: Ipsilateral
◉ Anterior spinocerebellar.
Answer: Double crosses
◉ Decussation.
Answer: Crossing of nerve fibers
◉ Upper motor neuron.
Answer: Brain to spinal cord
◉ Lower motor neuron.
Answer: Spinal cord to muscle
◉ Corticospinal tract.
Answer: Voluntary limb movement; decussates in medullary
pyramids
◉ Anterior corticospinal.
Answer: Axial muscles
◉ Lateral corticospinal.
, Answer: Limbs
◉ Vestibulospinal tract.
Answer: Balance
◉ Tectospinal tract.
Answer: Head and eye reflexes
◉ Reticulospinal tract.
Answer: Muscle tone
◉ Rubrospinal tract.
Answer: Minor in humans; fine motor
◉ Stretch reflex.
Answer: Monosynaptic; maintains tone
◉ Muscle spindle.
Answer: Stretch receptor
◉ Alpha motor neuron.
Answer: Causes contraction