Introduction to Neural Integration and Reflexes

Flashcards based on key concepts from the lecture covering neural integration, reflexes, and brain structures.

Lumbar Plexus

A network of nerves formed from the ventral rami of spinal nerves L1 to L4, including important nerves like genitofemoral and femoral.

Genitofemoral Nerve

A nerve that serves the genitals and part of the femur.

Lateral Femoral Cutaneous Nerve

A nerve that supplies sensation to the skin over the anterior lateral and posterior thigh.

Sacral Plexus

A network of nerves formed from the ventral rami of spinal nerves L4 to S4, including the pudendal and sciatic nerves.

Sciatic Nerve

The largest nerve in the body, branching into the tibial and fibular nerves.

Neural Integration

The process by which sensory information is processed and organized in the brain via neural pools.

Divergence

A neural pattern where one neuron sends signals to multiple neurons, amplifying a message.

Convergence

A neural pattern where multiple inputs are integrated into one neuron.

Reflex Arc

The neural pathway that mediates a reflex action, typically involving sensory neurons, interneurons, and motor neurons.

Monosynaptic Reflex

A reflex that involves only one synapse, such as the knee-jerk reflex.

Polysynaptic Reflex

A reflex involving multiple synapses and interneurons, allowing for more complex responses.

Ipsilateral Reflex

A reflex where both the sensory input and motor output occur on the same side of the body.

Contralateral Reflex

A reflex where the sensory input on one side of the body results in a motor response on the opposite side.

Babinski Reflex

A reflex in infants where stroking the sole of the foot causes toes to fan out, indicating immature nervous system development.

Cerebrum

The largest part of the brain responsible for intelligence, memory, and voluntary actions, divided into left and right hemispheres.

Cerebellum

The part of the brain responsible for coordination of movements, balance, and fine motor skills.

Thalamus

A brain structure acting as the 'grand central station' for sensory information, routing it to the appropriate area.