Locomotion

Define proprioception and why it is important

Sense of the relative position of body parts and if/how they are moving

It is impt as proprioreceptors inform CNS of body postition, strenght and speed of movement so motor output can be modified as needed and ensure posture is appropriate

What are the 2 types of proprioception? Are they ipsilateral/contralateral?

Subconscious proprioception (ipsilateral cerebellum)

• sit, stand,breath, chew, scratch and basic locomotion

Conscious proprioception (contralateral somatosensory cortex)

• fine complex movements

If subconscious proprioception is affected, what signs will the animal have?

Ataxia

Swaying of body (cant find postural platform)

Base wide/narrow stance (trying to balance)

Non-intention tremor

• Not intending to move

• hv tremor staying still

If conscious proprioception is affected, what signs will the animal have?

Stumbling

Knuckling (cant correct knuckle back to right position)

intention tremor (tremor when trying to move)

Write down the pathways for subconscious and conscious proprioception

Subconscious:

Proprioceptor → Grey matter in spinal cord → Ipsilateral cerebellum

Conscious:

Proprioceptor →medulla → thalamus → contralateral somatosensory cortex

What are the functional regions of cerebellum and their function?

Vestibulocerebellum - coordinate balance and eye movement

Spinocerebellum - coordinate muscle tone and movement

Cerebrocerebellum - plan movement

what must an animal have to determine normal proprioception?

Normal Motor system