Question

Answer questions 1-3 with a brief explanation

1. This region of the brain that is responsible for the contribution of somatic motor movements, which regulates balance in movements.

1. Thalamus
2. Cerebrum
3. Amygdala
4. Cerebellum

2. Mark was taken to the ER due to a lack in feeling of pain and temperature sensations around his body. It was discovered that part of his spinal tract, connecting the spine and thalamus, was severed. Which tract was likely severed, causing his lack in above sensations?

1. Anterior Spinothalamic tract
2. Spinocerebellar tract
3. Lateral spinothalamic tract
4. Spinocerebral tract

3. The part of the nervous system responsible for control of the bodily functions not consciously directed, such as breathing, the heartbeat, and digestive processes.

1. Central
2. Somatic
3. Autonomic

Answer 1

1) The region of the brain that is responsible for the contribution of somatic motor movements, which regulates balance in movements :-

(d) Cerebellum

Cerebellum is responsible for regulation of balance, maintains posture, coordinates muscle movements also contributes somatic motor movements.

Amygdala - It is responsible for perception of emotions and helps to store memory.

Thalamus - It mainly relay motor and sensory signals to the cerebral cortex.

Cerebrum - Performs higher functions like interpreting touch, vision, hearing, speech and also fine control of movements.

Thus the correct answer is (d) Cerebellum.

2) There was lack in pain and temperature sensations around his body. The tract that was affected :-

(c) Lateral spinothalamic tract

The tract which connect spinal cord to thalamus was severed so options (b) and (d) are incorrect.

Now, Anterior spinothalamic tract carries sensations of crude touch and pressure.

Lateral spinothalamic tract carries sensations of pain and temperature.

Thus the correct answer is (c) Lateral spinothalamic tract.

3) The part of the nervous system responsible for control of the bodily functions not consciously directed, such as breathing, the heartbeat, and digestive processes :-

(c) Autonomic Nervous system

Nervous system is divided into two parts :-

• Central Nervous system (CNS)
• Peripheral Nervous system (PNS)

CNS controls musculoskeletal reflexes and other which are consciously directed.

PNS is again divide into Autonomic and Somatic Nervous system.

? Somatic nervous system responsible for voluntarily movements.

?Whereas the Autonomic Nervous system controls self regulated action i.e. control bodily functions that are not consciously directed.

Thus the correct answer is (c) Autonomic Nervous system.