NEUR20050 lecture11 - movement motor cortex

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what is the corticospinal and brain pathway

1. sesnorimotor

2. corticospinal pathway

3. thalamus

4. basal ganglia

5. brains

what are the four major vertral regions

1. cervical - 7 vertbrae (C1-C7)

2. thoracic - 12 vertebrae (T1-T12)

3. Lumbar - 5 vertebrae (L1-L5)

4. sacral - 5 vertabrae (S1-S5)

what sre DRG

dorsal root ganglia They carry sensory messages from various receptors

where does the sesnroy input come through

comes through dorsal horn

where is the motor output

comes through ventral horn

what is somatic motor system

directly go from CNS to skeletal muscle

what is autonomic motor system

CNS → postanglionic fibre → automomic ganglion → postganglionic fibre → this leads to muliple vesicales like cardiac muscle and smooth muscle to gland cells

waht are the 3 types of skeletal muscle fibres

• slow oxidative type 1

• fast oxidative type 2

• fast glycolytic type 2

Slow oxidative (Slow fatigue resistant) – Type I

• thin and contain large amounts of myoglobin and mitochondria

• contain similar myosin fibres with low ATPase acitvity

• contraction is therefore slow and lower intensity

• contraction is therefore slow and lower intensity

• in the control of posture.

isoform

any of two or more functionally similar proteins that have a similar but not identical amino acid sequence and are either

• fast oxidative type 2

• fast glycolytic type 2

• thicker and contain less myoglobin

• ATPase activity is hgih and c